Kevin Breznahan (born November 24, 1968, in New York City, New York) is an American actor who made his screen debut in an uncredited role as a busboy in Regarding Henry (1991, starring Sean Connery), followed by his first credited role as Roy Harley in Alive (1993, directed by Frank Marshall). He went on to appear in I Love Trouble (1994, starring Nick Nolte), Heartwood (1998), SLC Punk! (1998, with Tim Robbins), and Magnolia (1999, directed by Paul Thomas Anderson), for which he and the cast won the Gotham Independent Film Award for Best Ensemble Performance. He is married to Jessica Davies (since August 6, 2019) and they have one child. His most notable film credits include Patrick Manchester in Superbad (2007, with Michael Cera and Jonah Hill), the Signal Hill Man in There Will Be Blood (2007, starring Daniel Day-Lewis), Little Arthur in Winter's Bone (2010, starring Jennifer Lawrence), Ron in Manhattan Night (2016), and Donnie in Once Upon a Time in Venice (2017). Other credits include Adventureland (2009, with Jesse Eisenberg), The Winning Season (2009), Love Liza (2002, with Philip Seymour Hoffman), You, Me and Dupree (2006), Alien Autopsy (2006), and The Cobbler (2014). On television he has appeared in Billions (2017, 6 episodes as Johnny Burke), The Deuce (2018, 2 episodes as Jersey), At Home with Amy Sedaris (2017), The Heart, She Holler (2011–2014, as Doc), Lucky (2003, 13 episodes as Danny Boy), Law & Order: Criminal Intent (2001, 2 episodes), and Law & Order: Special Victims Unit (2000). More recently he appeared in Seeds (2018), Almost Home (2018), Misty Button (2019), Teenage Euthanasia (2021), and Crybaby Bridge (2023).