The real Jan Lewan, whose life this film is based, was in attendance at the Sundance Film Festival 2017 screening at the Eccles theatre. During the cast and crew Q&A, Jan joined Jack Black
onstage to perform an a capella version of the Polka Rap. See more
On the first check that elderly investors Ed and Anita present to Jan, their address in the upper right-hand corner is listed as "Hazelton," PA. However, the correct spelling of the Pennsylvania town in which the movie is set is "Hazleton." See more
When I was little boy in Poland, all the times, I dreaming of America. So I come, I work hard, and I climb to the highest stars.
[on stage singing
Oh, la, la; Ole, ole, ole, ole; O la-di, o la-la; Ole, ole, ole, ole; O la-di, o la-la Let's go!