Nim's Island star Gerard Butler vehemently denies that he and Cameron Diaz are hooking up.

Reports claim the two got cozy at the Shutters Hotel in Santa Monica, California, and Teddy's bar in Hollywood's Roosevelt Hotel.

But Butler, 38, says everything has been blown of proportion.

"If I take a dog for a walk, apparently I'm f—king my dog!" Butler told photographers Thursday in L.A. after a morning run.

Diaz, 35, recently told British GQ that she doesn't want to be tied down.

"It's the first time I haven't had one in 10 years, and I'm enjoying what I'm getting out of this moment," she said.