The Children’s Oncology Support Fund (COSF) brought together leaders from entertainment, philanthropy, and business for its 4th Annual Aspen Snow Ball Gala, held on March 21 at the St. Regis Aspen, to raise awareness and support for pediatric cancer research and wellness programs nationwide. Led by COSF Founder and Aspen Snow Ball Chairman Thomas Pierce, the evening was hosted by Chelsea Handler and honored Goldie Hawn with the Philanthropic Achievement Award for her work with MindUP through The Goldie Hawn Foundation.
This year’s black-tie event embraced a “Pure Imagination” theme, transforming the evening into an immersive experience centered on hope, possibility, and COSF’s core mission: remission is the goal.
Hawn, joined by Kurt Russell, received the honor following a tribute that included remarks from Kate Hudson and a presentation by Dr. Lawrence Piro. Stella Roy was also recognized with the Humanitarian of Light Award.
The program blended entertainment and storytelling, opening with a theatrical presentation inspired by Charlie and the Chocolate Factory, featuring William H. Macy as narrator. Performances from Wilson Phillips, Rumer Willis, and Mojave Grey energized the evening, with Wilson Phillips delivering the headlining set.
A wide-ranging guest list included Rachel Zoe, Emmanuelle Chriqui, Sam Trammell, Edgar Ramirez, Brooke Burke, and Nicky Whelan, among others, reflecting the event’s growing influence across industries.
Beyond the stage, the gala delivered a dynamic fundraising experience, featuring live and silent auctions, immersive activations, and a high-energy balloon pop. Luxury and lifestyle brands, including Brunello Cucinelli, Alexis Bittar, Hearts on Fire, TAO, and Snowmass Mountain, contributed to the evening’s elevated experience.
Supported by partners such as Campari Group, Caymus Vineyards, and the St. Regis Aspen, the event continues to expand its reach and impact.
Founded by Pierce after the loss of a close friend to cancer, COSF remains committed to advancing critical care initiatives and innovative treatments for children across the country.
With another successful Aspen gathering, the Snow Ball Gala continues to solidify its place as a signature philanthropic event, where purpose, community, and creativity come together to drive meaningful change. Take a look at some photos of the event below:
ASPEN, COLORADO – MARCH 21: (L-R) Thomas Pierce, Stella Roy, Goldie Hawn and Kurt Russell attend COSF’s 4th Annual Aspen Snow Ball Gala on March 21, 2026 in Aspen, Colorado. (Photo by Nick Tininenko/Getty Images for for Children’s Oncology Support Fund)ASPEN, COLORADO – MARCH 21: (L-R) Goldie Hawn and Kurt Russell attend COSF’s 4th Annual Aspen Snow Ball Gala on March 21, 2026 in Aspen, Colorado. (Photo by Nick Tininenko/Getty Images for for Children’s Oncology Support Fund)ASPEN, COLORADO – MARCH 21: (L-R) Goldie Hawn and Rumer Willis attend COSF’s 4th Annual Aspen Snow Ball Gala on March 21, 2026 in Aspen, Colorado. (Photo by Nick Tininenko/Getty Images for for Children’s Oncology Support Fund)ASPEN, COLORADO – MARCH 21: (L-R) Wendy Wilson, Carnie Wilson, Chynna Phillips and guests COSF’s 4th Annual Aspen Snow Ball Gala on March 21, 2026 in Aspen, Colorado. (Photo by Nick Tininenko/Getty Images for for Children’s Oncology Support Fund)ASPEN, COLORADO – MARCH 21: Brooke Burke Charvet speaks onstage during COSF’s 4th Annual Aspen Snow Ball Gala on March 21, 2026 in Aspen, Colorado. (Photo by Nick Tininenko/Getty Images for for Children’s Oncology Support Fund)ASPEN, COLORADO – MARCH 21: Guest attends COSF’s 4th Annual Aspen Snow Ball Gala on March 21, 2026 in Aspen, Colorado. (Photo by Nick Tininenko/Getty Images for for Children’s Oncology Support Fund)ASPEN, COLORADO – MARCH 21: Wilson Phillips performs onstage during COSF’s 4th Annual Aspen Snow Ball Gala on March 21, 2026 in Aspen, Colorado. (Photo by Nick Tininenko/Getty Images for for Children’s Oncology Support Fund)ASPEN, COLORADO – MARCH 21: Thomas Pierce speaks onstage during COSF’s 4th Annual Aspen Snow Ball Gala on March 21, 2026 in Aspen, Colorado. (Photo by Nick Tininenko/Getty Images for for Children’s Oncology Support Fund)ASPEN, COLORADO – MARCH 21: Guest attends COSF’s 4th Annual Aspen Snow Ball Gala on March 21, 2026 in Aspen, Colorado. (Photo by Nick Tininenko/Getty Images for for Children’s Oncology Support Fund)ASPEN, COLORADO – MARCH 21: Guests attend COSF’s 4th Annual Aspen Snow Ball Gala on March 21, 2026 in Aspen, Colorado. (Photo by Nick Tininenko/Getty Images for for Children’s Oncology Support Fund)ASPEN, COLORADO – MARCH 21: (L-R) Carly Weber and Scott Weber speak onstage during COSF’s 4th Annual Aspen Snow Ball Gala on March 21, 2026 in Aspen, Colorado. (Photo by Nick Tininenko/Getty Images for for Children’s Oncology Support Fund)ASPEN, COLORADO – MARCH 21: (L-R) Wendy Wilson, Chynna Phillips, Thomas Pierce and Carnie Wilson attend COSF’s 4th Annual Aspen Snow Ball Gala on March 21, 2026 in Aspen, Colorado. (Photo by Nick Tininenko/Getty Images for for Children’s Oncology Support Fund)ASPEN, COLORADO – MARCH 21: Kurt Russell attends COSF’s 4th Annual Aspen Snow Ball Gala on March 21, 2026 in Aspen, Colorado. (Photo by Nick Tininenko/Getty Images for for Children’s Oncology Support Fund)ASPEN, COLORADO – MARCH 21: (L-R) Scott Rigsby, Brooke Burke Charvet and guests attend COSF’s 4th Annual Aspen Snow Ball Gala on March 21, 2026 in Aspen, Colorado. (Photo by Nick Tininenko/Getty Images for for Children’s Oncology Support Fund)ASPEN, COLORADO – MARCH 21: Kate Neilson attends COSF’s 4th Annual Aspen Snow Ball Gala on March 21, 2026 in Aspen, Colorado. (Photo by Nick Tininenko/Getty Images for for Children’s Oncology Support Fund)ASPEN, COLORADO – MARCH 21: Lacy Nicole attends COSF’s 4th Annual Aspen Snow Ball Gala on March 21, 2026 in Aspen, Colorado. (Photo by Nick Tininenko/Getty Images for for Children’s Oncology Support Fund)ASPEN, COLORADO – MARCH 21: Natalie Lindley attends COSF’s 4th Annual Aspen Snow Ball Gala on March 21, 2026 in Aspen, Colorado. (Photo by Nick Tininenko/Getty Images for for Children’s Oncology Support Fund)ASPEN, COLORADO – MARCH 21: Guest attends COSF’s 4th Annual Aspen Snow Ball Gala on March 21, 2026 in Aspen, Colorado. (Photo by Nick Tininenko/Getty Images for for Children’s Oncology Support Fund)ASPEN, COLORADO – MARCH 21: Renee Blythewood attends COSF’s 4th Annual Aspen Snow Ball Gala on March 21, 2026 in Aspen, Colorado. (Photo by Riccardo Savi/Getty Images for Children’s Oncology Support Fund)ASPEN, COLORADO – MARCH 21: Christian Madsen (R) performs onstage during COSF’s 4th Annual Aspen Snow Ball Gala on March 21, 2026 in Aspen, Colorado. (Photo by Riccardo Savi/Getty Images for Children’s Oncology Support Fund)ASPEN, COLORADO – MARCH 21: Wilson Phillips performs onstage during COSF’s 4th Annual Aspen Snow Ball Gala on March 21, 2026 in Aspen, Colorado. (Photo by Riccardo Savi/Getty Images for Children’s Oncology Support Fund)ASPEN, COLORADO – MARCH 21: Shari Liu Fellows speaks onstage during COSF’s 4th Annual Aspen Snow Ball Gala on March 21, 2026 in Aspen, Colorado. (Photo by Riccardo Savi/Getty Images for Children’s Oncology Support Fund)ASPEN, COLORADO – MARCH 21: Lawrence Piro speaks onstage during COSF’s 4th Annual Aspen Snow Ball Gala on March 21, 2026 in Aspen, Colorado. (Photo by Riccardo Savi/Getty Images for Children’s Oncology Support Fund)
The Children’s Oncology Support Fund (COSF) brought together leaders from entertainment, philanthropy, and business for its 4th Annual Aspen Snow Ball Gala, held on March 21 at the St. Regis Aspen, to raise awareness and support for pediatric cancer research and wellness programs nationwide. Led by COSF Founder and Aspen Snow Ball Chairman Thomas Pierce, the evening was hosted by Chelsea Handler and honored Goldie Hawn with the Philanthropic Achievement Award for her work with MindUP through The Goldie Hawn Foundation.
This year’s black-tie event embraced a “Pure Imagination” theme, transforming the evening into an immersive experience centered on hope, possibility, and COSF’s core mission: remission is the goal.
Hawn, joined by Kurt Russell, received the honor following a tribute that included remarks from Kate Hudson and a presentation by Dr. Lawrence Piro. Stella Roy was also recognized with the Humanitarian of Light Award.
The program blended entertainment and storytelling, opening with a theatrical presentation inspired by Charlie and the Chocolate Factory, featuring William H. Macy as narrator. Performances from Wilson Phillips, Rumer Willis, and Mojave Grey energized the evening, with Wilson Phillips delivering the headlining set.
A wide-ranging guest list included Rachel Zoe, Emmanuelle Chriqui, Sam Trammell, Edgar Ramirez, Brooke Burke, and Nicky Whelan, among others, reflecting the event’s growing influence across industries.
Beyond the stage, the gala delivered a dynamic fundraising experience, featuring live and silent auctions, immersive activations, and a high-energy balloon pop. Luxury and lifestyle brands, including Brunello Cucinelli, Alexis Bittar, Hearts on Fire, TAO, and Snowmass Mountain, contributed to the evening’s elevated experience.
Supported by partners such as Campari Group, Caymus Vineyards, and the St. Regis Aspen, the event continues to expand its reach and impact.
Founded by Pierce after the loss of a close friend to cancer, COSF remains committed to advancing critical care initiatives and innovative treatments for children across the country.
With another successful Aspen gathering, the Snow Ball Gala continues to solidify its place as a signature philanthropic event, where purpose, community, and creativity come together to drive meaningful change. Take a look at some photos of the event below:
ASPEN, COLORADO – MARCH 21: (L-R) Thomas Pierce, Stella Roy, Goldie Hawn and Kurt Russell attend COSF’s 4th Annual Aspen Snow Ball Gala on March 21, 2026 in Aspen, Colorado. (Photo by Nick Tininenko/Getty Images for for Children’s Oncology Support Fund)ASPEN, COLORADO – MARCH 21: (L-R) Goldie Hawn and Kurt Russell attend COSF’s 4th Annual Aspen Snow Ball Gala on March 21, 2026 in Aspen, Colorado. (Photo by Nick Tininenko/Getty Images for for Children’s Oncology Support Fund)ASPEN, COLORADO – MARCH 21: (L-R) Goldie Hawn and Rumer Willis attend COSF’s 4th Annual Aspen Snow Ball Gala on March 21, 2026 in Aspen, Colorado. (Photo by Nick Tininenko/Getty Images for for Children’s Oncology Support Fund)ASPEN, COLORADO – MARCH 21: (L-R) Wendy Wilson, Carnie Wilson, Chynna Phillips and guests COSF’s 4th Annual Aspen Snow Ball Gala on March 21, 2026 in Aspen, Colorado. (Photo by Nick Tininenko/Getty Images for for Children’s Oncology Support Fund)ASPEN, COLORADO – MARCH 21: Brooke Burke Charvet speaks onstage during COSF’s 4th Annual Aspen Snow Ball Gala on March 21, 2026 in Aspen, Colorado. (Photo by Nick Tininenko/Getty Images for for Children’s Oncology Support Fund)ASPEN, COLORADO – MARCH 21: Guest attends COSF’s 4th Annual Aspen Snow Ball Gala on March 21, 2026 in Aspen, Colorado. (Photo by Nick Tininenko/Getty Images for for Children’s Oncology Support Fund)ASPEN, COLORADO – MARCH 21: Wilson Phillips performs onstage during COSF’s 4th Annual Aspen Snow Ball Gala on March 21, 2026 in Aspen, Colorado. (Photo by Nick Tininenko/Getty Images for for Children’s Oncology Support Fund)ASPEN, COLORADO – MARCH 21: Thomas Pierce speaks onstage during COSF’s 4th Annual Aspen Snow Ball Gala on March 21, 2026 in Aspen, Colorado. (Photo by Nick Tininenko/Getty Images for for Children’s Oncology Support Fund)ASPEN, COLORADO – MARCH 21: Guest attends COSF’s 4th Annual Aspen Snow Ball Gala on March 21, 2026 in Aspen, Colorado. (Photo by Nick Tininenko/Getty Images for for Children’s Oncology Support Fund)ASPEN, COLORADO – MARCH 21: Guests attend COSF’s 4th Annual Aspen Snow Ball Gala on March 21, 2026 in Aspen, Colorado. (Photo by Nick Tininenko/Getty Images for for Children’s Oncology Support Fund)ASPEN, COLORADO – MARCH 21: (L-R) Carly Weber and Scott Weber speak onstage during COSF’s 4th Annual Aspen Snow Ball Gala on March 21, 2026 in Aspen, Colorado. (Photo by Nick Tininenko/Getty Images for for Children’s Oncology Support Fund)ASPEN, COLORADO – MARCH 21: (L-R) Wendy Wilson, Chynna Phillips, Thomas Pierce and Carnie Wilson attend COSF’s 4th Annual Aspen Snow Ball Gala on March 21, 2026 in Aspen, Colorado. (Photo by Nick Tininenko/Getty Images for for Children’s Oncology Support Fund)ASPEN, COLORADO – MARCH 21: Kurt Russell attends COSF’s 4th Annual Aspen Snow Ball Gala on March 21, 2026 in Aspen, Colorado. (Photo by Nick Tininenko/Getty Images for for Children’s Oncology Support Fund)ASPEN, COLORADO – MARCH 21: (L-R) Scott Rigsby, Brooke Burke Charvet and guests attend COSF’s 4th Annual Aspen Snow Ball Gala on March 21, 2026 in Aspen, Colorado. (Photo by Nick Tininenko/Getty Images for for Children’s Oncology Support Fund)ASPEN, COLORADO – MARCH 21: Kate Neilson attends COSF’s 4th Annual Aspen Snow Ball Gala on March 21, 2026 in Aspen, Colorado. (Photo by Nick Tininenko/Getty Images for for Children’s Oncology Support Fund)ASPEN, COLORADO – MARCH 21: Lacy Nicole attends COSF’s 4th Annual Aspen Snow Ball Gala on March 21, 2026 in Aspen, Colorado. (Photo by Nick Tininenko/Getty Images for for Children’s Oncology Support Fund)ASPEN, COLORADO – MARCH 21: Natalie Lindley attends COSF’s 4th Annual Aspen Snow Ball Gala on March 21, 2026 in Aspen, Colorado. (Photo by Nick Tininenko/Getty Images for for Children’s Oncology Support Fund)ASPEN, COLORADO – MARCH 21: Guest attends COSF’s 4th Annual Aspen Snow Ball Gala on March 21, 2026 in Aspen, Colorado. (Photo by Nick Tininenko/Getty Images for for Children’s Oncology Support Fund)ASPEN, COLORADO – MARCH 21: Renee Blythewood attends COSF’s 4th Annual Aspen Snow Ball Gala on March 21, 2026 in Aspen, Colorado. (Photo by Riccardo Savi/Getty Images for Children’s Oncology Support Fund)ASPEN, COLORADO – MARCH 21: Christian Madsen (R) performs onstage during COSF’s 4th Annual Aspen Snow Ball Gala on March 21, 2026 in Aspen, Colorado. (Photo by Riccardo Savi/Getty Images for Children’s Oncology Support Fund)ASPEN, COLORADO – MARCH 21: Wilson Phillips performs onstage during COSF’s 4th Annual Aspen Snow Ball Gala on March 21, 2026 in Aspen, Colorado. (Photo by Riccardo Savi/Getty Images for Children’s Oncology Support Fund)ASPEN, COLORADO – MARCH 21: Shari Liu Fellows speaks onstage during COSF’s 4th Annual Aspen Snow Ball Gala on March 21, 2026 in Aspen, Colorado. (Photo by Riccardo Savi/Getty Images for Children’s Oncology Support Fund)ASPEN, COLORADO – MARCH 21: Lawrence Piro speaks onstage during COSF’s 4th Annual Aspen Snow Ball Gala on March 21, 2026 in Aspen, Colorado. (Photo by Riccardo Savi/Getty Images for Children’s Oncology Support Fund)