Like most people, Finn Wittrock‘s earliest memories of Judy Garland are of seeing her as Dorothy, walking the yellow brick road and rocking those iconic ruby slippers.

Over the last few years, watching her performances in films like the 1954 A Star is Born and Judgment at Nuremberg, he discovered a new side of her as an actress — but nothing could prepare him for the experience of playing her fifth husband, Mickey Deans, in Judy.