He joined SNL in 2002, spending eight years as a cast member on the show, where he performed offbeat sketches.His most famous role on the show led to a feature film adaptation, Mac Gruber (2010), that preceded his departure from the program.He also co-starred with Andy Samberg in the first SNL Digital Short, "Lettuce".He often spent long hours crafting his sketches for the program, passing deadlines, but his pieces were often greeted warmly at table reads.
He was voted "Best Personality" by his graduating class and served as class president.
After obtaining a history degree at the University of California, Los Angeles and becoming a financial broker like his father, Forte changed his career path to comedy and took classes with the improvisational comedy group The Groundlings in Los Angeles.
He soon found he favored writing best, and he worked as a writer on That '70s Show before he auditioned for Saturday Night Live (SNL).
His only role was often Bush, leaving him no chance for more "absurd" pieces he favored.
He was nearly fired from the program following his third season (2004–05), but after two three-week extensions to decide his fate, he was brought back.