Kellan Lutz & Annalynne Mccord Split up!

Twilight hunk Kellan Lutz and his 90210 star girlfriend Annalynne Mccord have split, according to U.S. reports.

Reports of a break-up spread over the weekend when the two stars were spotted partying separately at Halloween-themed events.

And now Life & Style magazine is reporting the couple has ended it's two-year romance.

A source tells the publication, "AnnaLynne was getting cozy with model/actor Aaron O'Connell while at Veuve Clicquot's Yelloween at Lavo in Las Vegas. They were holding hands and flirting all night. The two are clearly a couple. They looked cute together."

Meanwhile, Lutz was partying at the Borgata in Atlantic City, New Jersey on Saturday, with one eyewitness telling Life & Style, "He definitely seemed like a bachelor."

Representatives for the two stars have yet to comment on the break-up story.