As diligently as actors and crew work on set, it’s commonplace to re-record some lines down the road. For the teams behind “Eurovision Song Contest: The Story of Fire Saga” and “The Trial of the Chicago 7” the process of painstakingly matching audio and visual was further complicated by working remotely during COVID.
Eliza Pollack Zebert, supervising ADR and dialogue editor on “Eurovision,” says the L.A.-based team ran remote recording sessions. At times, they even had actors in entirely different countries, with lead Rachel McAdams in Atlanta and her singing stand-in Molly Sanden in Sweden.
Source: https://www.aol.com/entertainment/lip-sync-technology-advances-adr-145734300.html