Charlize Theron
There is no denying that the South African-born star is incredible at her job. However, her personality may not be for the real world. Actress Tia Mowry reportedly approached Theron after a spin class to say hi, but after Mowry welcomed her, Theron rolled her eyes, saying, “Oh my god.” There is no excuse for being rude. It takes more energy to roll your eyes and say, “Oh my god” than to say hi back.

Charlize Theron
Mike Myers
According to Amy Hill, one of Meyers’ co-stars in The Cat in the Hat, the actor was quite a nightmare to work with during filming. He fired cast and crew who looked at him “incorrectly.” She said they even had a dedicated individual feed Meyers chocolates while he walked around the set. He held up production for hours as well. Calling this kind of person a nightmare sounds about right.

Mike Myers