Kristen Stewart: ‘Of Course’ I Enjoyed Celebrating Robert Pattinson’s Birthday (EXCLUSIVE VIDEO)

Kristen Stewart is notoriously private about her relationship with boyfriend Robert Pattinson.

That said, Celebuzz was still able to squeeze out a tiny bit of info from Kristen on Rob’s star-studded birthday at the premiere of Snow White and the Huntsman Monday night in London.

What secrets did she spill?

Asked whether she had a great time celebrating her beau’s big 2-6, the 22-year-old beauty laughed: “Yeah. Of course!”

Meanwhile, sources for Celebuzz spotted Kristen and Rob together at the Snow White after party on Monday, where Rob was by his girlfriend’s side all night.”

“[They] couldn’t look more enamored with each other” said our source, adding: “Rob couldn’t be more proud of Kristen. It’s an amazing film.”

Also spotted at the party was Rob’s sister, Lizzy. Talk about a family affair!

Of course, while Kristen didn’t reveal much else about the party on the red carpet, she was more than willing to stalk about her stunning Marchesa dress, which rivaled co-star Charlize Theron’s as the best look of the night.

“When I put it on, I just thought it was kind of the craziest thing I’ve ever seen!” she gushed. “I know everyone is going to be like, ‘Kristen Stewart, she’s so sinister, she’s so weird and dark.’ It’s bare!”

If by bare, you mean awesome, then, yes. We agree!

Kristen plays the titular character in Snow White and the Huntsman, out June 1, a film that required her to don a British accent for the first time in her career. Celebuzz joked that Kristen’s accent is better than her British-born boyfriend’s. To which she quipped: “It’s because he’s trying to lose his! I don’t know what the deal is with him.”

For our full red-carpet interview with Kristen Stewart, watch the video above!

And just in case you missed it, check out part I of our interview with Kristen from the Snow White junket below, in which she talks about the obvious sexual tension between her and her Snow White co-star, Chris Hemsworth!