[1] Born in Rome, Maggi rose to fame in the 1980s as an actor.

During that time, he made at least six film appearances and was quite popular on stage early in his career.

Other actors he dubs includes Steve Guttenberg, Gary Oldman, Danny Huston, John Turturro and Robert Downey Jr.[2] Maggi's character dubbing roles include Perry Cox (portrayed by John C. McGinley) in Scrubs, Leroy Jethro Gibbs (portrayed by Mark Harmon) in NCIS and Tony Stark (portrayed by Robert Downey Jr.) in the Marvel Cinematic Universe.

In his animated roles, Maggi has been the current Italian voice of Chief Wiggum in The Simpsons since the fifth season.

He even provided the Italian voice of Sheriff Woody in the animated film Toy Story 4 following the death of Woody's longtime Italian dubber Fabrizio Frizzi the previous year.