Forrest Gump is starring Tom HanksTom Hanks starred in Larry Crowne. Larry Crowne has genre ComedyLarry Crowne is starring Rob Riggle
[Human]: I like the movie Forrest Gump and thought it was funny, who is the main star of that movie?  [Assistant]: Tom Hanks, Sam Anderson, and Siobhan Fallon Hogan are the starring actors  [Human]: Is Tom Hanks in any other funny movies? [Assistant]: Yes, Tom Hanks starred in the comedy Larry Crowne [Human]: That sounds good, who else is in the movie? 
Rob Riggle, Rita Wilson, and Randall Park are some of the starring actors in that movie.