Cast of My Blue Heaven

Steve Martin stars as Vincent "Vinnie" Antonelli, a former mobster-turned informant who finds himself in a witness protection program.

Rick Moranis plays Barney Coopersmith, an uptight FBI agent tasked with ensuring Vinnie stays out of trouble.

Joan Cusack portrays Hannah Stubbs, a district attorney who becomes romantically involved with Vinnie.

Melanie Mayron takes on the role of Crystal Rybak, a friend of Hannah's who becomes suspicious of Vinnie.

Bill Irwin appears as Kirby, a bumbling associate of Vinnie who provides comedic relief throughout the film.

Carol Kane is Shaldeen, a quirky character who crosses paths with Vinnie and Barney on their escapades.

William Hickey portrays Billy Sparrow / Johnny Bird, a mob boss who Vinnie testifies against.

Deborah Rush plays Linda, Barney's ex-wife who adds an extra layer of complexity to his character.

Daniel Stern portrays Will Stubbs, Hannah's ex-husband who still has feelings for her.

Jesse Bradford appears as Jamie, Hannah and Will's son who forms an unexpected bond with Vinnie.

Corey Carrier is Tommie, Barney's son who gets caught up in the chaos surrounding Vinnie.

Seth Jaffe as Umberto Mello, a minor character in the film who encounters Vinnie during his antics.