#1 Ryan Gosling
The heartthrob was told to never come back to the set of The Lovely Bones when he showed up 60 pounds overweight!
#2 Christian Bale
Bale was once hired, fired and then hired again when Leonardo DiCaprio backed out of a role at the last second. That movie? American Psycho.
#3 Megan Fox
Megan Fox got the boot from the Transformers series after she compared the director to Hitler.
#4 Anne Hathaway
Anne was cast as the main female character in Judd Apatow's Knocked Up. However, she got into an argument with the director about the inclusion of a vagina in the film and was ultimately replaced by Katherine Heigl.
#5 Eric Stoltz
Believe it or not, Stoltz was originally cast as the main character in Back To The Future. He even shot several scenes! But apparently he just couldn't nail the comedic lines and so he was replaced.
#6 Sylvester Stallone
This one is kind of hard to imagine, but Sly was actually supposed to star in Beverly Hills Cop. Thanks to creative differences he was swapped at the last minute for Eddie Murphy.
#7 Samantha Morton
The British actress was initially cast as the voice in Spike Jonze's Her. She was extremely easy to work with, but at the end of the day, the director just didn't think she had the right sound.
#8 Stuart Townsend
It's kind of hard to imagine the Lord Of The Rings trilogy without Viggo Mortensen, but did you know that his character was initially meant to be played by Stuart Townsend?
#9 Annette Bening
Remember how awesome Michelle Pfeiffer was as Catwoman in 1992's Batman Returns? Well that was almost Bening's role until she got pregnant and had to be replaced.
