Cameron Diaz Dating Co-Star Nikolaj Coster-Waldau? ‘The Mask’ Actress Spotted Kissing ‘Game Of Thrones’ Star On Set

Is Cameron Diaz dating her co-star Nikolaj Coster-Waldau? The two were spotted stealing kisses on the set for their new film "The Other Woman" in New York City on Monday. The only problem: Nikolaj is married!

Diaz and the Danish actor kissed several times as they posed for Cameron's cell phone camera while sitting together on a Manhattan park bench, The Daily Mail reports.

Cameron, 40, wrapped her arms around Nikolaj's neck, while Nikolaj wrapped an arm around her waist in between bites of a sandwich.

The actors were dressed casually. Cameron was wearing cuffed jeans, nude ballet flats, and an off-shoulder white T-shirt. Nikolaj, 42, wore a white T-shirt, dark jeans, and a cream cardigan.

The pair also struck several other poses and made funny faces for selfies on Cameron's phone.

Nikolaj is happily married, so we're guessing their kisses were part of the scene.

"The Other Woman" is ironically about a woman who learns her boyfriend is actually a married man, The Daily Mail reports.

Nikolaj was almost unrecognizable in his laymen's outfit, compared to his "Game of Thrones" alter ego Jaime Lannister who is regularly seen on the HBO show donning armor and a sword. 

Cameron later filmed a scene with co-star Kate Upton, looking a little more dressed-up in a red, yellow and black dress with a white blazer.

Kate looked stunning even in a simple pair of short denim shorts and a sheer patterned blouse and white sneakers.

So who is Cameron really dating? She was recently tied to billionaire Elon Musk, but he denied a relationship between the two. She just keeps us guessing.

"The Other Woman" will hit theaters April 2014.