Gallagher played a potential career threat to Tim Robbins's studio executive in The Player (1992); the comatose fiancé of Sandra Bullock in While You Were Sleeping (1995); a real estate salesman having an affair with Annette Bening in American Beauty (1999); a media executive in Mr. Deeds (2002); and a political reporter exposing media ethics during a presidential debate in The Last Debate.
Gallagher memainkan ancaman karier potensi untuk Tim Robbins 'eksekutif studio di The Player (1992); tunangan koma dari Sandra Bullock di While You Were Sleeping (1995), seorang salesman real estate berselingkuh dengan Annette Bening di American Beauty (1999), seorang eksekutif media dalam Mr. Deeds (2002), dan reporter politik yang mengekspos etika media selama debat presiden di The Last Debate.