Katherine Heigl has slammed Hollywood’s obsession with the thin and beautiful, stating she is sick of trying to fit in with movie industry conformity.

The Grey’s Anatomy actress believes the continually changing trends for the body beautiful is unattainable and she won’t give in to the fickleness of it.

She says: "I understand what it is I am trying to sell and what it is I want people to buy. I'm never going to be a size two (U.K. size six) but I do try to maintain a certain look that appeals.

"Unfortunately, it keeps changing - it went from uber-thin and then that was wrong, then it went to curvy, and then that was wrong. It's like, 'God, what do you want?' I can't reform myself every time the trends change."

She adds: "I always thought I was normal. And I was normal, but just not in Hollywood."