10.Rob Reiner was reluctant to cast Billy Crystal in When Harry Met Sally as they were best friends IRL and he was worried about what would happen if it didn't work. Albert Brooks, Tom Hanks, and Michael Keaton were among actors approached first.
12.The two stars' first meeting was like a rom-com meet-cute. Lana Condor turned down his request to run lines together while in the waiting room for the auditions, as she really wanted to focus on memorising them without distraction.
16.In a meeting with Joseph Gordon-Levitt, the director of 500 Days of Summer asked him who he saw Summer being. He instantly said Zooey Deschanel and they hired her shortly before going on to hire him.