RUPERT GRINT is terrified at the prospect of kissing EMMA WATSON in the final HARRY POTTER film - because his co-star is like a sister.

The teenage stars have worked together since they were cast in the first installment of the boy wizard franchise, Harry Potter and the Philosopher's Stone, which was released in 2001.

Now the pair will have to pucker up in the final film, Harry Potter and the Deathly Hallows - and Grint admits he is dreading it.

He says, "The kiss will be quite uncomfortable."Emma's like a sister to me so it's going to be, like, really, really weird."