Celebs participating in the #PassTheMic campaign will hand their social media accounts over to a COVID-19 expert for the day to spread awareness about how people can help end the pandemic and to hear from those who, according to the promotional video, “actually know what they’re talking about.”

“It’s my honor and complete joy to #PassTheMic to Dr. Anthony Fauci, the director of the @NIAID at @NIHgov. He’s probably one of the most important people in the world right now,” Roberts wrote on Instagram on Thursday. “If you don’t know him, he’s the man making sure we get the most accurate, critical information about #COVID19. Things like how we can keep ourselves and our communities safe. Today he’s taking over my account to shed light on the importance of a global response to this pandemic, the latest treatment research and the power of staying cautiously optimistic.”

The director of the National Institute of Allergy and Infectious Diseases then shared several informative posts to the “Pretty Woman” actress’ feed, sharing his tips, facts, and research on the virus.

Roberts also interviewed Fauci in her Instagram Story.

Other celebs surrendering their Twitter, Facebook, and Instagram accounts to healthcare professionals and experts for a day include Sarah Jessica Parker, Rainn Wilson, Penélope Cruz, Busy Philipps, Robin Wright and Shailene Woodley.

The initiative launched Thursday and will continue for three weeks as part of the One World Campaign.