[1] Cavanagh made her film debut in Penny Marshall's A League of Their Own (1992), co-starring with Tom Hanks, Geena Davis, Madonna, Rosie O'Donnell and Lori Petty.

[3] Following her silver screen debut, Cavanagh was cast in supporting roles in two Mel Brooks comedies, as Broomhilde in Robin Hood: Men in Tights (1993) and as Essie in Dracula: Dead and Loving It (1995).

Cavanagh was featured in the short-lived second season of Bob (1993), and appeared in the recurring role of Trudy McHale (from 1998-99), who marries Al Borland in the series' finale of the sitcom Home Improvement (1991-99) starring Tim Allen, Patricia Richardson and Earl Hindman.

An Actor's Equity (AEA) theatre troupe, the Comedy Cabaret landed a summer residence at Peninsula Players in Fish Creek, Wisconsin, where it developed works for a predominantly tourist trade and then relocated to their winter home in Chicago at CrossCurrents.

Throughout her tenure, Megan Cavanagh (who thus earned her Actors' Equity union card) starred in numerous productions including the cult-hits An Evening with Elmore & Gwendolyn Putts - The Neighbors Next Door and The TV Dinner Hour (the latter featured IO Theater founder Del Close).