For Childhood Cancer Awareness Month, Jennifer Aniston, Marlo Thomas, Sofia Vergara, Drew Barrymore and other St. Jude Celebrity Ambassadors will unite for the 30 Days #forStJude social media campaign to help raise awareness and support for St. Jude Children's Research Hospital.

This year’s theme for Childhood Cancer Awareness Month is “Let’s cure childhood cancer. Together.” With togetherness in mind, an all-star lineup of more than 50 celebrities will join Aniston, Vergara and Barrymore to take part in 30 Days #forStJude including: Luis Fonsi, Michael Strahan, Mark Wahlberg, Cindy Crawford, Kaia Gerber, Kate Beckinsale, Lucy Hale, Shaun White, JoJo Siwa, Halima Aden, Emma Roberts, Justin Hartley, Chrissy Metz, Ashley Greene, Jennifer Morrison, Lance Bass, Kathryn Newton, Nick Swisher, JoAnna Garcia Swisher, Claire Holt, Zac Posen, Jessica Szohr, Dave Annable, Odette Annable, Charlie Weber, Bryan Greenberg, Geoff Stults, Parker Young and Elizabeth Olsen among others.