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Twilight was the major winner at Sunday night's Teen Choice Awards - and all of its cast members were on hand to celebrate, at least for a little while.

At the event, witnesses told E! News that Robert Pattinson was the undeniable star of the ceremony, saying:

"Girls kept running up to [Rob] asking to get pictures with him, and he was so nice about it. Rob would smile and meet all of the giggling girls, while [Kristen Stewart] would look on and just laugh about all the attention he got. Some even asked if the two were an actual couple, and they would just shoot each other a look, blush and start giggling."

Such attention made it difficult for for Pattinson and Stewart to slip out early... but the couple has learned how to be secretive!

Reportedly, as their co-stars did an interview with Entertainment Tonight, Rob and Kristen darted out the back of the building and left together in a black Navigator. Their destination?

The Chateau Marmont, where Pattinson had a room. Said a hotel source:

"Kristen was in and out all weekend."

So was R Patt, it's safe to assume. Think about it.

RPattz like txting KStew

Robert Pattinson’s phone bill must be through the roof!

The British actor has told a pal he texts rumored girlfriend Kristen Stewart a whopping 400 times a month!

“He says a day doesn’t feel right unless he talks to her a dozens times — anything that goes through his mind, he relays to her,” a source told American tabloid the National Enquirer.

Meanwhile, sources on the Vancouver, Canada, set of the third Twilight film Eclipse are adamant Stewart, 19, has dumped longtime boyfriend Michael Angarano and is “hooking up” with Pattinson.

“Word on the set of Twilight is that Angarano and Kristen are completely broken up,” one insider told People magazine. “While people don’t want to talk about it, everyone is pretty convinced that Pattinson and Stewart are hooking up.”

Fueling split rumors, Angarano was recently seen chatting, drinking, and leaving with an unknown brunette at a bar in Studio City, Californa. They both left in his car and were last seen entering an apartment block in Sherman Oaks at around 1 a.m.

Rob’s ex Camilla Belle recently denied claims she’s rekindled her romance with the Sexiest Man In The World.