Inside Robert Pattinson & Kristen Stewart’s Romantic Night at the Cannes Film Festival (EXCLUSIVE DETAILS)

Taryn Ryder / May 24, 2012

Kristen Stewart had something to celebrate Wednesday night at the Cannes Film Festival. Not only did she receive great reviews for her performance in On the Road, but boyfriend Robert Pattinson was there to support her every step of the way!

After Rob walked the red carpet, he waited inside for Stewart, 22. Sitting in front of her in the packed theater (she sat with her cast), we’re told Pattinson, 26, and Kristen had a few minutes to catch up before the film started. However, at the after-party at Magic Garden Club, Celebuzz is told the couple only had eyes for each other.

So what went down?

Holding court at a private table, sources tell us Rob and Kristen “never left each other’s sides.”

“They just looked really happy,” adds our insider. “They hung out with friends, like Sam Riley, but it seemed like Rob and Kristen were in their own little world. It looked like they spent the entire night laughing! You could tell that they were in great spirits, and Rob couldn’t have looked more proud.”

And there was no shortage of PDA! The couple was not shy to show affection, “kissing, cuddling, and giggling.” Adds our source, “they looked like two kids in love!”

You can see Pattinson keep his girl close in the photo above that someone posted on Twitter. Not to mention their adorable kiss was caught by paparazzi (kind of bittersweet), and there is even video of it down below.

Quick recap: Rob pulls Kristen in and they sort of start swaying back and forth. Champagne dancing, perhaps? Then he kisses her on the forehead (you can tell she’s smiling!) before there is some sort of animated conversation. We’d die to be a fly on the wall to hear what they are talking about. Pattinson seems to be shaking his head “Noooo” for a while, does a funny little dance, and then he and Kristen go in for the kill. This is too much cuteness to handle for one day!

Let the guessing games begin…what do you think they were talking about?!