John Charles MacKenzie (born October 17, 1970) is a Canadian actor.^[1] He is best known for portraying Skip Fontaine on the HBO series Vinyl (2016) and Reagan "Normal" Ronald on the Fox series Dark Angel (2000–2002). He has also appeared in several films directed by Martin Scorsese, including The Departed (2006), The Wolf of Wall Street (2013), and The Irishman (2019).

John Charles MacKenzie was born in Peterborough, Ontario on October 17, 1970,^[2] one of four sons born to nurse Mary and pharmacist Bill MacKenzie. He was raised in Ottawa, Ontario,^[3] and attended Pinecrest Public School and Sir John A. Macdonald High School.^[3] He later studied at Concordia University^[3] and the London Academy of Music and Dramatic Art (LAMDA).^[4]

MacKenzie spent several years working in theatre across Canada until he was picked by Neil Simon to do the national tour of Simon's play Biloxi Blues, which ran for over 600 performances over the course of a year and a half.^[3] His first television success came as Arnold Spivak in the Emmy Award-winning television series Murder One,^[3][5] which ran for two seasons on ABC. He was cast as Reagan "Normal" Ronald in the series Dark Angel,^[3] which won a People's Choice Award and ran for two seasons on Fox. Some of his more recent notable roles include Fred Allen on October Faction, Dr. Arnold Spivak on Hemlock Grove,^[3][5] and Skip Fontaine on Vinyl.^[3][6][7] He has made over 150 television appearances^[5] and has appeared in the Martin Scorsese films The Aviator,^[3][7] The Departed,^[3][7] The Wolf of Wall Street,^[3][7] The Irishman, and Killers of the Flower Moon.

MacKenzie is married to American screenwriter Erin Cressida Wilson. They have one son, Liam, and split their time between Los Angeles and New York City.^[3]