US News

Mike’s gal heats up his pool

He’s taken, ladies!

The mystery blonde who was seen partying with Olympic golden boy Michael Phelps in London Sunday night is his aspiring-model girlfriend, Megan Rossee, 25, whom he has been dating since January.

“Things started to heat up just prior to the Olympics,” a source told Hollyscoop, the gossip Web site that first identified the bodacious blonde on Phelps’ arm.

The Hollywood cocktail waitress apparently likes jocks. Earlier this summer, the 5-foot-9 stunner reportedly was dating former Major League baseball player/reality TV star Doug Reinhardt but opted to get serious with Phelps, 27, just before the London Games.

“Michael knew that he had to leave for the Olympics and not wanting to give up on their relationship, he flew Megan out to the [Olympic] trials in Omaha and then to London for the Games,” the Web site reported.