Things are heating up fast between Ian Somerhalder and his new girlfriend Nikki Reed. A source told US Weekly (via Hollywood Life) that the pair is already living together in Somerhalder's Atlanta home even though they have only been dating for three weeks.

The source also claims that Reed visits her new beau at work on the set of "The Vampire Diaries." Somerhalder costars on the show with his ex-girlfriend, Nina Dobrev. It's not clear if Reed's visits to the show bother Dobrev, but there have been rumors of a little drama on set.

According to E! Online, out of the three main stars of "The Vampire Diaries" - Somerhalder, Dobrev and Paul Wesley - only two have signed new contracts for Season 7. The one star who hasn't signed on is not sure if he or she wants to continue on with the show, a source told E!.

Season 6 of the hit CW show is set to premiere Oct. 2. While Warner Bros. refused to comment on the rumors, the source told E! that the network is thinking about the possibility of continuing the show without any of the main stars. Instead, Season 7 would shift its focus to other characters.

Last month at San Diego Comic-Con executive producer Julie Plec told the site that she didn't see "The Vampire Diaries" ending any time soon.

"I think the show will go as long as the actors want the show to go," Plec said. "You know, look, everybody's under contract. I know that we've got plans for season six, we've got plans for season seven. I know that our bosses have plans for seasons eight, nine, and 10. I said I want to be part of it as long as I know I could keep telling good stories and as long as the ensemble people that I work with want to be there and are committed and dedicated. So, so far so good, you know. We'll see how long we can stay, doing it well. We'll make sure that we don't start sucking."

What do you think of Ian Somerhalder and Nikki Reed's romance?