The red carpet might be fun to watch on TV, but it has to be difficult at times when you're a celebrity. There are all those flashing camera lights, for one thing, not to mention screaming fans and nosy reporters in your face with inane questions.

But while some celebrities glide across the red carpet with ease and a smile, others look as if they desperately wish they were anywhere else. They pose awkwardly and sometimes look as though they are grimacing in pain.

Here are some of the most red carpet-shy celebrities.

Kristen Stewart
The “Twilight” actress rarely fails to stun on the red carpet, and she will sign autographs for fans, but she tends to look uncomfortable. She revealed the reason for it in a 2010 interview with Hello! magazine."I don't feel very comfortable on the red carpet," she said, PopEater reported. "I look out there at a thousand people and I realize they could rush me and assassinate me. No security could protect me. Ostensibly they're fans, but I think about them turning on me." Reuters
Johnny Depp
Johnny Depp is the red carpet Man of Mystery. The famously private actor tends to cover up by wearing dark glasses, hats and scarves and is not one to smile much. Reuters
Rooney Mara
Rooney Mara seems to be a bit blindsided by all the fame and attention her role in “The Girl With the Dragon Tattoo” has brought. She looks almost terrified (albeit stunning) when she's on the red carpet. Reuters
Ginnifer Goodwin
The “Once Upon a Time” actress isn't usually one to crack a big smile on the red carpet. She tends to stay tight-lipped, smiling without her teeth (which is weird, cause we've seen them and they're great!). Reuters
Leonardo Dicaprio
Leonardo Dicaprio seems to be doing everything in his power to lose the heartthrob image that plagued him during his “Romeo + Juliet” and “Titanic” days. Don’t worry, Leo, you’ve lost it. We all know you’re a “tough guy” and a "serious" actor now, so loosen up and show us those pearly whites! Reuters
Victoria Beckham
Victoria Beckham is notorious for rarely smiling in public. Like, ever. Rest assured, she did crack a huge one recently when she and her husband, David Beckham, appeared on the Kiss Cam at a Lakers game. Reuters
Chloe Sevigny
“Big Love” actress Chloe Sevigny’s emotions on the red carpet are often hard to tell, although she seemed happy at the Met Gala the other night. Reuters