Rob & kristen's blossoming romance

BY Nicole Lyn Pesce
DAILY NEWS STAFF WRITER

Monday, August 17th 2009, 10:05 AM

Robert Pattinson and Kristen Stewart attended the Kings of Leon concert with several of their 'Eclipse' co-stars.

They're having a bloody good time!

"Twilight's" toothsome couple Robert Pattinson and Kristen Stewart aren't doing much to hide their blossoming romance.

While they are in Vancouver to film the next installment of the vampire romance saga, Pattinson and Stewart have been spotted getting cozy off-screen.

As the "Eclipse" cast and crew kicked back at the Miku sushi restaurant over the weekend, the smoldering co-stars were seen leaning in dangerously close to one another, taking cigarette breaks at the same time ' and even leaving together.

And on Saturday, Pattinson (known by besotted tweens everywhere as hunky vamp Edward Cullen) was photographed nuzzling nose-to-nose with Stewart (who plays his human love interest Bella Swan) at a Kings of Leon concert in Vancouver's General Motors Place.

"They've decided to be more public about going out now. They're not boyfriend and girlfriend, but they've definitely hooked up," an insider spills to Us Weekly.

The incriminating pics were taken days after actress Jennie Garth dished to the Daily News' Gatecrasher column that Pattinson is dating one of his co-stars, a secret she picked up from her hubby, "Twilight" actor Peter Facinelli.

"I can't say [if it's Kristen Stewart or Nikki Reed], because that would be breaking my promise," Garth said. "But he is dating one of them!"

The hot couple's public display of affection comes one week after they were spotted going on several low-key dates in Los Angeles.

Before taking off for Canada, Pattinson and Stewart were also photographed separately stepping out onto a hotel room balcony the morning after a date.

"Eclipse," the third movie in the "Twilight" series, hits theaters in 2010. In the meantime, fanatics can get their Edward and Bella fix with the "New Moon" sequel opening in November.