Jesse Eisenerg used Chopin to stop 'A Real Pain' from feeling "juvenile".
The 41-year-old star - who wrotre and directed the movie as well as starring in it opposite Kieran Culkin - was keen for the Holocaust-history comedy/drama to feel "sophisticated" and mature, despite the "funny and fraught" relationship at the centre of the story so opted to score the film almost entirely with piano pieces by the Polish composer.
