Robert Pattinson and Kristen Stewart couldn't keep away from each other during a night out in Vancouver, it's been claimed.

The reported couple joined fellow Twilight co-stars, including Ashley Greene, at a private party at the Players Chophouse restaurant.

The night included a performance from Jackson Rathbone's band 100 Monkeys, but Pattinson and Stewart apparently only had eyes for each other.

"Rob and Kristen stayed pretty close together throughout the night, often going outside to chat with other guests they seemed to know," a source told People magazine.

The pair, who have been romantically linked repeatedly over recent months, are also understood to have enjoyed a dinner together recently.

"Rob and Kristen were seated beside each other and very close all night," an insider said.

The Twilight cast are in Vancouver filming the third movie in the vampire saga, Eclipse, which is due out early next summer.

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