Wow! That's a lotta celebs!
What cause could bring together so many people?
Cancer and the fight against it, of course.
We previously mentioned that TONS of a-listers are going to join the Stand Up To Cancer telethon on September 7.
Well now we have proof that some of the biggest TV stars, including Hayden Panettiere, Lucy Liu, Joshua Jackson, and Mindy Kaling, are all in the fight together!
Check out the video (above) to try and spot some of your favorite celebs!