Reese Witherspoon thinks Robert Pattinson is "extraordinarily attractive".

The 34-year-old actress - who was previously married to Ryan Phillippe and dated Jake Gyllenhaal - worked alongside the British hunk on the set of new movie 'Water for Elephants' and believes the hype around him is justified as he is very good looking.

She said: "The only thing I can compare it to is when Leonardo DiCaprio was in 'Titanic'. It was that kind of fervour about a person. The women lining up outside the set - it was unbelievable - till 5 o'clock in the morning waiting to just glimpse him.

"He's extraordinarily attractive, I'm not gonna lie! Every day there would be like, 50 people staked out. There would be people camped out in the hallways of our hotel. All day, all night long, it didn't matter. People were there to try to catch a glimpse."

However, the blonde beauty believes the best thing about the 24-year-old star - who is believed to be dating his 'Twilight' co-star Kristen Stewart - is he is a hard worker who is not "a bad boy".

She told MTV News: "Robert is such a great guy from a great family. That's the thing that's so funny. He's not really this bad boy, he's just a great guy and really worked hard on 'Water for Elephants'. We really worked long hours, long days. He looks totally different in the movie."