Currie: I often joke that it took 50 years of friendship to get this movie made. I’ve known Nick for 30 years, Pete for 26 and now Mahershala [Ali, who plays Dr. Shirley] and Viggo [Mortensen, who plays Tony Lip] for two apiece. It’s a movie about friends and family, and I can honestly say that, by shoot’s end, the cast and crew became like family to me. I cannot think of a nicer, more professional group of people to be associated with, and their tireless efforts and selfless manner have made this movie the most pleasant professional experience of my life.
Source: latimes.com – Los Angeles Times