Mary Steenburgen (gebore 8 Februarie 1953) is 'n Amerikaanse aktrise en vervaardiger. Sy is bekend vir haar rolle in die rolprente Time After Time (1979), Back to the Future Part III (1990), Step Brothers (2008), en Last Vegas (2013). 1978: Goin' South 1979: Time After Time 1980: Melvin and Howard 1983: Cross Creek 1983: Romantic Comedy 1985: One Magic Christmas 1987: Dead of Winter 1989: Miss Firecracker 1989: Parenthood 1990: Back to the Future Part III 1991: The Butcher's Wife 1993: What's Eating Gilbert Grape 1994: Clifford 1994: It Runs in the Family 1994: Pontiac Moon 1995: Powder 2001: The Trumpet of the Swan 2001: Wish You Were Dead 2001: Nobody's Baby 2002: Mrs. Pilgrim Goes to Hollywood 2003: Casa de los babys 2003: Hope Springs 2003: Beyond Borders: John Sayles in Mexico 2005: Marilyn Hotchkiss' Ballroom Dancing & Charm School 2006: O Lucky Malcolm! 2007: Nobel Son 2007: Elvis and Anabelle 2008: Step Brothers 2008: Four Christmases 2008: American Outrage 2009: In the Electric Mist 2009: The Open Road 2009: The Proposal 2013: Last Vegas 2013: Brahmin Bulls 2013: The Tale of the Princess Kaguya 2014: Song One 2015: A Walk in the Woods 2016: The Book of Love 2016: Dean 2016: Katie Says Goodbye 2017: I Do...