Andy Samberg and Lorne Michaels at the premiere of “Hot Rod” at the Chinese Theater on July 26, 2007 in Los Angeles, California. Getty Images ...

The show’s boss Lorne Michaels teased that there’s going to be major cast changes to Season 51, which premieres Oct. 4.

Lorne Michaels donates his "Saturday Night Live" archive to UT Austin's Harry Ransom Center, showcasing nearly 50 years of TV history.