Kristen Stewart & Robert Pattinson's Date Night With Katy Perry, VIDEO & PHOTO (WATCH)

Robert Pattinson and Kristen Stewart have been making the rounds since he returned to Los Angeles on March 16 following a two-month movie shoot in Australia.

Pattinson, 26, and Stewart, 23 were spotted on another date on Thursday, but this time they were with their mutual pals Katy Perry and Raising Hope actress Shannon Woodward. Together they all celebrated the birthday of Perry's assistant, Tamra Natisin.

An onlooker shot a six-second video of the gathering and posted it on Youtube.

The couple were first spotted together in public on Tuesday at their favorite Los Feliz haunt, Ye Rustic Inn. There, they were kind enough to take a photo with a fan.

The photographer, Laura Austin took the picture with her iPhone and posted it on Twitter and Instagram later that night. She captioned the photo: "Poor Lany was attacked by vampires last night." Austin later wrote about the experience on her Rad Collector blog.

Austin's friend and another onlooker shared their eyewitness accounts of the couple's reunion.

"My friend is a photographer so she is not shy about going up to people and asking for photos, so she just asked them for one," Austin's friend who is in the picture told E! News.The fan said Stewart was "super nice" but Pattinson was a "little bit more shy."

Another eyewitness said they noticed some PDA between the stars- they were "touchy-feely" and Stewart was "holding on to his jacket and had her hand on his back."

Another source told E! News he is "so excited to be back" and that he "really missed Kristen."