Jessica Biel dating Bradley Cooper?

Jessica Biel is bulking up in a bid to snare Bradley Cooper sources say.

According to American tabloid theNational Enquirer, Biel has invited Cooper her costar in box office bombThe A-Team to join her for a trek in the Santa Monica Mountains.

“She’s very physically fit and she always felt that Bradley was perfectly suited to her,” a source said.

“To appeal to his adventurer side, she asked if he’d like to go hiking with her rather than on a traditional date,” the insider divulged.

“And it worked.

“Bradley agreed to go when they can work out the time.”