De Niro is portraying Sheeran, the tough Irishman hitman who is said to have carried out over 25 mob murders, including that of legendary Teamster head Hoffa (Pacino).

Romano will play Bill Bufalino, a Teamster lawyer with ties to the mob.

The movie, budgeted at over $100 million as it covers several decades of the characters’ lives, is due to begin lensing in August.

Jane Rosenthal and Emma Tillinger Koskoff are producing. Steve Zaillian wrote the script.

Romano is having a major moment this summer. The Big Sick, in which he stars with Kumail Nanjiani, has garnered excellent reviews and has become the specialty hit of the summer (the movie is set to platform to a wide release this weekend). Romano also stars in Get Shorty, Epix’s upcoming TV adaptation of the 1995 hit film that skewered Hollywood. Romano’s Irishman casting adds to his sunny summer.

The actor, who previously worked with Scorsese when he starred on the HBO series Vinyl, is repped by ICM Partners, manager Rory Rosegarten and law firm Del Shaw.