Is Taylor Lautner dating Emma Roberts ?

Last Autumn, Taylor Lautner and Taylor Swift were Hollywood’s too-adorable class couple.

This year? It’s New Moon star Taylor Lautner, 18, and Emma Roberts, 19 — his Valentine’s Day co-star and niece of Julia Roberts.

A source tells OK!: “She thinks he’s the cutest thing ever.

“They met on the set, and there was an instant attraction.”

Now both single, the duo is finally heating up.

At Vanity Fair’s post-Oscar party on March 7, a witness says “his arm was around her waist and she leaned her head on his shoulder. They talked for 40 minutes, with her hand on his knee!”

OK!