AceShowbiz -

Katharine McPhee apparently is dating her co-star Elyes Gabel. The "American Idol" alum and the British actor, who take parts on CBS' series "Scorpion" are in romantic relationship, Us Weekly learns, and they have been seen packing on PDA in some occasions.

Most recently, McPhee and Gabel stayed close while attending the private premiere of "Scorpion" at Warwick in Hollywood alongside other cast members. According to the report, the two arrived in separate cars, but they "were inseparable and got cozy all night." An eyewitness additionally said that the singer had fun on the dance floor with her friends during the commercial breaks.

Back in August, McPhee and Gabel were also photographed being affectionate on the filming set. Wearing a tank top and black pants, the 30-year-old singer/actress leaned for a peck on the cheek while grabbing his butt.

McPhee's love history made headlines last year after she was captured on camera kissing "Smash" director Michael Morris when they were both still married. Morris, who has three children with Mary McCormack, rekindled his relationship with her. McPhee, meanwhile, filed for divorce from her husband Nick Cokas in May, months after being caught cheating on him.