- Fake American: Scotsman James McAvoy and Northern Irishman Ciarán Hinds (who play father and son).
- What Could Have Been:
- Joel Edgerton was the first actor cast as the male lead, but had to drop out due to scheduling conflicts.
- Eva Green auditioned for the role of Eleanor.
- Eleanor was originally written as a small, enigmatic role. It wasn't until after Jessica Chastain (whom Ned Benson specifically wrote the part for) read the script and asked to know more about the character's background that Benson got the idea to craft a whole new movie from her perspective.
Trivia / The Disappearance of Eleanor Rigby