Happy 57th Tony!
Men in Black (1997)
Directed by Barry Sonnenfeld and produced by Steven Spielberg, this great movie has spawned a sequel and it is rumored that will be another one, in addition to an animated series and a role-playing game.
Tony plays Jack Jeebs, an alien that owns a pawn shop. Also starring in this film are Tommy Lee Jones, Will Smith, Vincent D'Onofrio, Linda Fiorentino, Rip Torn, and David Cross.
The Siege (1998)
This was a pretty amazing film that came out, interestingly enough, about 2 years before 9/11 and reflects what could have happened after that event pretty well if cooler heads had not prevailed.
It stars Denzel Washington, Annette Bening, and Bruce Willis, as well as Tony, who plays an FBI agent. It was directed by Edward Zwick, who is the same guy that directed Glory, Legends of the Fall, Courage Under Fire and The Last Samarai.
In this Pixar film, Tony provided the voice for the car Luigi, a Fiat that owns a tire shop in Radiator Springs.
This film has a pretty amazing "cast" that includes Owen Wilson, Larry the Cable Guy, Paul Newman, Cheech Marin, George Carlin, Richard Petty, Michael Keaton, and John Ratzenberger.
This film was nominated for a Best Animated Feature Oscar but lost to Happy Feet (no clue why it got chosen over Cars). It won a Golden Globe for Best Animated Film.