In Saturday Night, J.K. Simmons plays Milton Berle, a real-life TV personality who is unabashedly arrogant; the real Berle was actually banned from Saturday Night Live. The recent comedy Saturday Night tells the story of the chaotic first episode of SNL. Starting from 90 minutes before the show to the opening sketch, the movie depicts the show’s original cast and its creator, Lorne Michaels. Saturday Night‘s cast is full of familiar faces portraying even more familiar faces, who offer additional lore connected to SNL.
https://screenrant.com/saturday-night-live-milton-berle-banned-true-story/