T.R. Knight – known best for his role as George O’Malley on Grey’s Anatomy – has been added to the cast for the upcoming Jackie Robinson biopic, 42. According to THR, the Emmy-nominated actor will be joining Chadwick Boseman and Harrison Ford for the project, with Brian Helgeland directing.

Boseman signed on to play the legendary baseball player back in December, with Ford following suite shortly after, in order to play Branch Rickey, the man who signed Robinson. Knight will play Harold Parrott, “the Dodgers traveling secretary who has to deal with the repercussions of housing once Robinson joins the team.” Shame‘s Nicole Beharie is set to play Robinson’s wife, Rachel Isum, of whom he was married to for 27 years until his death in 1973. Law and Order: SVU‘s Christopher Meloni will also play Leo Durocher, the manager of the Brooklyn Dodgers.

Since leaving Grey’s Anatomy back in 2009, we haven’t seen Knight on the screen, except for a small role on an episode of SVU last year. He’s been doing some work on Broadway and off-Broadway to keep himself busy. It’s hard to say if his character will clock a lot of screen time with heavy hitters like Boseman and Ford, who will most likely dominate the film, but this should serve as some good big-screen experience for the actor.

What do you think of this most recent addition for 42?