A virtual table read of 'Fast Times at Ridgemont High,' for charity is now set for Sept 17 at 9PM ET on FB & TikTok. Cast includes Jennifer Aniston, Morgan Freeman, Henry Golding, Jimmy Kimmel, Shia LaBeouf, John Legend, Matthew McConaughey, Sean Penn, Brad Pitt, Julia Roberts. pic.twitter.com/3bvupR3Rv6

— The Playlist 🎬 (@ThePlaylist) September 14, 2020

Plain gray background.  Lighting on Brad's face (front, center right) is different from his background (overhead, left).  It is also devoid of shadows. So looks like green screen.

Angelina uses the white wall when she's in Briarcliff and Brad uses green screen when he is in the DeMille.