Louis Cancelmi is an American stage and film actor.

[1] He is best known for appearing in Boardwalk Empire (2014), Blue Bloods (2015–2016), The Irishman (2019), and Killers of the Flower Moon (2023).

[4] Cancelmi started acting in high school plays.

He attended Yale College, entering with interests in writing and mathematics but ultimately majoring in theater.

[6] The couple lives in the Hudson Valley with their children.