Hank Azaria joined what cartoon as a voice actor 10 years before acting in Mystery Men?
Mystery Men: Mystery Men is a 1999 American superhero comedy film directed by Kinka Usher and written by Neil Cuthbert and Bob Burden, loosely based on Burden's "Flaming Carrot Comics", and starring Hank Azaria, Claire Forlani, Janeane Garofalo, Eddie Izzard, Greg Kinnear, William H. Macy, Kel Mitchell, Lena Olin, Paul Reubens, Geoffrey Rush, Ben Stiller, Wes Studi, and Tom Waits. Hank Azaria:  He is known for starring in the animated television sitcom "The Simpsons" (1989–present), voicing Moe Szyslak, Apu Nahasapeemapetilon, Chief Wiggum, Comic Book Guy, Carl Carlson and numerous others.
"The Simpsons"