Are That '70s Show sweethearts Kelso (Ashton Kutcher) and Jackie (Mila Kunis) headed for permanent splitsville? Yes... at least if Malcolm in the Middle's Chris Masterson has anything to say about it.

"My plan is to sort of infiltrate that relationship and make her my own," laughs Masterson, whose multi-episode arc as Jackie's "dorky" cheese shop manager-slash-suitor kicked off last night. Next week, his polyester-clad character's plot to steal Kelso's main squeeze intensifies.

Explains the actor: "Basically, I'm pretty conniving. I'm like, 'Wow! Kelso was late picking you up again! That's three times this week!' And Jackie and I end up getting together because I say, 'You know what? Let me help you cheer up. Give me a hug!' And she goes to give me a hug and I go to kiss her. And I've already got her all worked up over Kelso so [at that point] she doesn't resist."

Natch, the jilted boyfriend learns of the intimate moment and he's not pleased. Masterson confesses that he's thrilled to be thrown in the middle of all that '70s drama. "It's cool because it's a turning point for them, and it's exciting to be part of that," he says. "They've had this relationship for quite a while and I get to come in and break it up — and I end up making out with Jackie!"

Nice work if you can get it...