PHOTO GALLERY: AnnaLynne McCord & Matt Lanter Get Flirty On Set

Oh, dear; looks like things are heating up between AnnaLynne McCord and Matt Lanter.

The 90210 stars, who play love interests on the series, were filming in Manhattan Beach, California, on Thursday, and AnnaLynne must have been feeling tense, because Matt felt the need to give her a neck massage between scenes.

Maybe they were just rehearsing? What will Kellan Lutz have to say about all this?

Click through the photo gallery and draw your own conclusions.