Robert Pattinson has revealed that he worries about his appearance.

The 27-year-old actor who has been voted Sexiest Man by Glamour Magazine, admitted that he is "weird" when it comes to his looks.

"It depends, sometimes. But I'm weird about my looks. Once you get photographed a lot, it changes you," he told InStyle magazine, "I remember when I first did Twilight I didn't care about how I looked - there was less pressure, I guess. I was like, 'I'm cool as s**t!'"

"[Now] every time I appear somewhere, I think, 'I don't know how many more times I can do this'. Dressing up to go somewhere and be looked at - I get so nervous. Up until the second I have to leave, I'll get changed a million times. It's crazy. Literally, just before I go, I look in the mirror and think, 'You look like s**t'. I start worrying about wrinkles," he said, adding, "Honestly, everyone who works with me knows they'll have to sit there and wait for me to go through my process of having my panic attack about how I look."

Meanwhile, Pattinson, who was officially named as the face of Dior Homme Fragrance in June revealed why he chose to be a part of the campaign.

"[I did it because] I wanted to do something different for me... doing something that is quite mainstream but also edgy fit into where I want my life to go," he told Elle France.

He also shared his views on the "Dior Homme man."

"The Dior Homme man is I think someone who's just a little bit wild... [He] does whatever he wants, is a bit of a free spirit, not really scared of anything, can be whoever he wants to be," Pattinson said.