Garrett got his start in show business working at various comedyclubs in Los Angeles, including 'The Improv' in Hollywood and The Ice House in Pasadena. In 1984, he became the first $100,000 grand champion winner in the comedy category of the TV show Star Search. This led to his first appearance, at age 23, on The Tonight Show starring Johnny Carson, making him one of the youngest comedians ever to perform on the show. His appearance with Carson brought Garrett a lot of national attention, and soon he was appearing as an opening act in several Vegas shows.
Garrett's distinctive deep voice has landed him prolific work as a voice actor, one of his first parts was he was the voice of wrestling legend Hulk Hogan for the cartoon series Hulk Hogan's Rock 'n Wrestling. Other roles were in the animated series the Mighty Ducks, 2 Stupid Dogs, The Spooktacular New Adventures of Casper, Project Geeker, Toonsylvania, A Bug's Life, Asterix and the Vikings, Superman the Animated Series and Justice League Unlimited (as Lobo) , Finding Nemo, Disney's One Saturday Morning and as Auguste Gusteau in Pixar's Ratatouille.
See his full credit list here.