2018 Stand Up to Cancer: See all the celebrities at the star-studded event

"Modern Family" co-stars Sofia Vergara, Sarah Hyland, Jesse Tyler Ferguson and Julie Bowen attend the live Stand Up To Cancer telecast at Barkar Hangar in Santa Monica on Sept. 7, 2018.

Matt Damon attends the live Stand Up To Cancer telecast at Barkar Hangar in Santa Monica on Sept. 7, 2018.

Brenda Song and Macaulay Culkin kiss during the live Stand Up To Cancer telecast at Barkar Hangar in Santa Monica on Sept. 7, 2018.

Alison Sweeney and Jillian Michaels take calls during the live Stand Up To Cancer telecast at Barkar Hangar in Santa Monica on Sept. 7, 2018.

Sofia Vergara attends the Stand Up To Cancer Live in Los Angeles on Sept. 7, 2018.

Sarah Hyland attends the Stand Up To Cancer Live in Los Angeles on Sept. 7, 2018.

Julie Bowen and daughters attend the Stand Up To Cancer Live in Los Angeles on Sept. 7, 2018.

Maria Menounos attends the Stand Up To Cancer Live in Los Angeles on Sept. 7, 2018.

Ken Jeong, Tony Hale and Ed Helms do a skit during the live Stand Up To Cancer telecast at Barkar Hangar in Santa Monica on Sept. 7, 2018.

Jillian Michaels attends the Stand Up To Cancer Live in Los Angeles on Sept. 7, 2018.

Shannen Doherty and a friend attend the Stand Up To Cancer Live in Los Angeles on Sept. 7, 2018.

Katie Couric attends the Stand Up To Cancer Live in Los Angeles on Sept. 7, 2018.

Jason Bateman attends the Stand Up To Cancer Live in Los Angeles on Sept. 7, 2018.

Little Big Town attends the Stand Up To Cancer Live in Los Angeles on Sept. 7, 2018.

Macaulay Culkin takes a call during the live Stand Up To Cancer telecast at Barkar Hangar in Santa Monica on Sept. 7, 2018.

Jesse Tyler Ferguson attends the Stand Up To Cancer Live in Los Angeles on Sept. 7, 2018.

David Spade attends the Stand Up To Cancer Live in Los Angeles on Sept. 7, 2018.

Marg Helgenberger attends the Stand Up To Cancer Live in Los Angeles on Sept. 7, 2018.

Alison Sweeney attends the Stand Up To Cancer Live in Los Angeles on Sept. 7, 2018.

Maddie Ziegler and Mackenzie Ziegler attend the Stand Up To Cancer Live in Los Angeles on Sept. 7, 2018.

Sonequa Martin-Green attends the live Stand Up To Cancer telecast at Barkar Hangar in Santa Monica on Sept. 7, 2018.

Ken Jeong attends the Stand Up To Cancer Live in Los Angeles on Sept. 7, 2018.

Brenda Song attends the Stand Up To Cancer Live in Los Angeles on Sept. 7, 2018.

Mark Harmon attends the Stand Up To Cancer Live in Los Angeles on Sept. 7, 2018.

Tyler Posey attends the Stand Up To Cancer Live in Los Angeles on Sept. 7, 2018.

Josh Brolin attends the Stand Up To Cancer Live in Los Angeles on Sept. 7, 2018.

Tony Hale attends the Stand Up To Cancer Live in Los Angeles on Sept. 7, 2018.

Eric McCormack attends the Stand Up To Cancer Live in Los Angeles on Sept. 7, 2018.

Marlee Matlin attends the Stand Up To Cancer Live in Los Angeles on Sept. 7, 2018.

Hannah Hart attends the Stand Up To Cancer Live in Los Angeles on Sept. 7, 2018.

Max Greenfield attends the Stand Up To Cancer Live in Los Angeles on Sept. 7, 2018.

Yael Braun attends the Stand Up To Cancer Live in Los Angeles on Sept. 7, 2018.

Michael Ealy attends the Stand Up To Cancer Live in Los Angeles on Sept. 7, 2018.

Olivia Holt attends the Stand Up To Cancer Live in Los Angeles on Sept. 7, 2018.