The actors stars sang and danced at the Grammy-nominated artist's Los Angeles concert

Credit: Han Myung-Gu/WireImage

Trust Sam Smith to bring out the vampires and werewolves!

At the Grammy-nominated artist’s second night at The Forum in Los Angeles, Twilight stars Taylor Lautner and Kristen Stewart reunited, joining up with Stewart’s friend Alicia Cargile and Lautner’s gal pal, actress Katherine Hughes.

Arriving just as Smith began his set around 9 p.m., Lautner greeted Stewart with a kiss on the cheek before she and Cargile returned to their seats a few rows back.

“Katherine sat on Taylor’s lap while a friend snapped photos of them,” says a source.

Thirty minutes into the concert, the actor – who kept an arm around Hughes much of the night – motioned at Stewart and Cargile to join him and his friends.

The two girls then settled into empty seats next to Lautner, and the group sipped on cocktails and danced and sang along.

“They were having a blast,” says the onlooker. “Taylor danced like crazy and Kristen was taking videos on her phone.”

During the encore, Lautner pulled Stewart out of her seat and threw his arm around Hughes and Cargile.

“All four of them had their arms around each other’s shoulders,” says the source. “They all seemed like they’ve known each other for a long time.”

The group met up with Smith backstage, where they paused to take a photo with the musician.