Gerard Bulter struggles to memorise lines

The '300' star admits that he kept forgetting his lines because he had too many.

"I had months to prepare and I still forgot my lines. But then again, I had a lot to say. In my defense I never shut up in this movie," said the actor who is rumoured to be dating Hollywood superstar Jennifer Aniston.

And it was co-star Katherine Heigl who came to his rescue. While he struggled with his lines for the film, Butler took dancing lessons to prepare for the film but admits that he would have been unable to pull it off without the help of Heigl, Femalefirst reported.

"I took a few dancing lessons because I had no idea what I was doing. But Katherine was just on it and she had it right away. That's why it came alive, because to be honest if I was dancing with somebody who wasn't that great, it would have been a disaster. Katie was on it and I wasn't," Butler said.