In 2008, director Jason Reitman lived his "SNL" dream. He was fresh off the success of "Juno," which earned Reitman a Best Director Oscar nomination and the film a Best Picture nomination. His agent reached out to Lorne Michaels and relayed Reitman's wish -- to do a guest writing stint on "Saturday Night Live.

Saturday Night' depicts the 90 minutes leading up to the very first episode of 'SNL' — but it takes some liberties with the truth. Here's what's fact and what's fiction.