Richard Masur is an American actor, best known for the films 61*, My Girl/My Girl 2, Risky Business, and The Thing. Other film credits include Lonely Boys, Tumbledown, Once in a Lew Moon, Les patriotes, Six Degrees of Separation, License to Drive, Walker, The Mean Season, Under Fire, and Blood In, Blood Out.

Theatre credits include his Broadway debut as Jack Stringer in The Changing Room (Morosco Theatre), Jerry Nachman/Stanley Joyce in Lucky Guy (Broadhurst Theatre), and Horst Ehmke in Democracy (Brooks Atkinson Theatre); Off-Broadway, as William Fox in Fetch Clay, Make Man (N.Y. Theatre Workshop), Sylvan in Olive and the Bitter Herbs (59E59 Theater), Martin Stone in Dust (Westside Theatre), Danny in Two Thousand Years (Acorn Theatre), David in A Feminine Ending (Playwright Horizons), Martin Marcus in The Ruby Sunrise (Martinson Hall), Vincent/Arthur Grosberg in Sarah, Sarah (N.Y.C. Center Stage); and Menelaus/Ajax in Troilus and Cressida (Mitzi E. Newhouse Theater).