The main actors in the film were:
* Jim Carrey (as "Larry)" - This was one of his first film roles!
* Rachel Ward (as "Molly)")
* David Strathairn (as "Tommy")
The film also featured:
* Art Hindle (as "Jake")
* Robert Goulet (as "Richard")
* Michael J. Fox (in a small role as "Young Tommy")
Hope this helps!