R2D2 and C3PO hated each other in real life! Well, the actors inside them.
Here's a list of quotes of classic actors dissing each other.
Some of them are hilarious, such as,
6. Vivian Leigh on Bette Davis after turning down a role in HUSH…HUSH SWEET CHARLOTTE: “I could just stand the thought of facing Joan Crawford at seven in the morning, but I couldn’t stand the thought of facing Bette Davis at that or any hour.”
20. Fanny Brice on Esther Williams: “Wet, she’s a star. Dry, she ain’t.” Dayum