Are Jessica Biel and Gerard Butler hooking up?

Actress Jessica Biel and Gerard Butler have sparked rumours of hooking up after they met at the set of their new movie, “Playing the Field”.
“From the beginning of the shoot, they were flirting with each other, But Biel, didn`t want things to get weird on the set,” the New York Daily News quoted a source close to the set of the actors` upcoming movie, as saying.
“They basically tried not to hook up,” the insider said.
Early last month, the source said that Biel had invited the 41-year-old Butler to accompany her for a weekend in New York.
“When they returned to the set on Monday, you could see and feel the difference in their relationship. You got the sense that they were together,” the source said.
According to Us Weekly, Butler “made a beeline for Jessica” when he arrived and “was really flirting with her” at a crewmember’s birthday party.

Another witness told People.com that Biel and Butler “looked like a couple” at a cast and crew dinner that took place before filming even began.

“Butler has a large personality, and everyone, including Jessica, gets caught up in his world,” A source also told the site.

Although representatives for Biel and Butler had initially dismissed reports of a romance, the story gained new life after the ‘Lost’ actress was spotted with her arms wrapped around the ‘300’ star`s waist as he rode his Harley-Davidson in Malibu.