PICS: Kristen Stewart dresses down for Radio One interview

Kristen Stewart looked remarkably fresh, considering she'd been partying with Robert Pattinson until the early hours of the morning

Despite partying with Robert Pattinson and her Snow White and the Huntsman co-stars until the early hours of yesterday morning, Kristen Stewart looked remarkably fresh as she arrived at Radio One for an interview appearance.

SEE KRISTEN AT THE SNOW WHITE PREMIERE HERE!

The usually surly starlet smiled and waved to photographers as she stepped out at the studios, dressed in jeans, a Led Zeppelin T-shirt and her favourite comfy flats.

She may have been out partying the night before, but it certainly didn't show, as Kristen arrived, a little windswept, but with glowing porcelain skin.

It's thought the actress partied until 5am the previous evening, after hitting the red carpet the at the premiere of Snow White and the Huntsmanin London's Leicester Square.

Kristen plus her Snow White pals hit an exclusive Ciroc-sponsored after-party at the Royal Courts of Justice, where they mingled with friends, family and the rest of the cast.

After changing out of her beautiful Marchesa gown (MC overheard her say: 'I love what I'm wearing but I can't wait to take this thing off') and into jeans and a t-shirt, Kristen arrived at the bash just minutes before boyfriend Robert Pattinson, who brought his family along, too.

According to onlookers,Rob and Kristen were up to their usual tricks, and spent the entire evening on separate tables, talking to different members of the cast.

But despite leaving the bash in separate cars and five minutes apart, Rob was later spied by an eagle-eyed snapper, sneaking into Kristen's swanky Claridge's hotel. 

SEE KRISTEN AT THE SNOW WHITE PREMIERE HERE!

WATCH: SNOW WHITE AND THE HUNTSMAN CAST INTERVIEWS

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