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Robert Pattinson, Kristen Stewart Nuzzle at Concert

The cast and crew of Eclipse took over Vancouver sushi restaurant Miku over the weekend to celebrate filming of the third Twilight installment – and all eyes were on costars Robert Pattinson and Kristen Stewart.

The two were very close during dinner, taking smoke breaks together and even leaving together.

See photos of stars who've hooked up on set

On Saturday, they snuggled at a Kings of Leon concert – when they weren't laughing and smoking cigarettes.

See photos of Robert and Kristen at the concert!

"They've decided to be more public about going out now," an insider tells the new issue of Us Weekly (on newsstands now). "They're not boyfriend and girlfriend, but they've definitely hooked up."

See Robert Pattinson's on-screen twin

Their Twilight costars are supportive.

"If they want to date each other, fine!" Billy Burke, who plays Stewart's dad, tells Us. "Look, when you're that age, you're going to make mistakes. You're going to date people you probably shouldn't date. It's all part of the growing process."

See sexy photos of Robert Pattinson at last year's Twilight premiere

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