Sam Heughan & Caitriona Balfe Dating: 'Outlander' Season 3 Stars Hooking Up Behind Mackenzie Mauzy's Back?

Sam Heughan and Caitriona Balfe just can't seem to shake off romance rumors. Although the "Outlander" season 3 co-stars have been noting that they are just friends, people still believe that they are hiding the truth. A new report is certainly not helping the duo erase the rumors, in fact, it even added more reason to believe that the duo are romancing behind the actor's real-life girlfriend Mackenzkie Mauzy's back.

Celeb Dirty Laundry suggests that Sam Heughan and Caitriona Balfe may have already taken their working relationship to the next level. The site revealed that the "Outlander" season 3 co-stars were caught hooking up on the set. As if that's not enough, insiders allegedly revealed that Sam Heughan and Caitriona Balfe were holding hands and getting flirty with each other.

"Sam and Caitriona were taking a short break between scenes when I saw them off to the side, holding hands and Sam was even whispering in her ear," an insider told the site. "She was laughing at whatever he said and well, they looked like an ordinary couple," the source added.

Although Sam Heughan and Caitriona Balfe usually tried to make their feelings towards each other as vague as possible, the "Outlander" season 3 actor may not contain his sadness anymore in working away with his leading lady. "It's always hard when we're apart, actually, because she's a great person, great to come to work with, and a very good actress," he told Vanity Fair. 

While Sam Heughan's new VF interview seemed to be sweet and romantic, he wasn't the first one who admitted missing his co-star. Caitriona Balfe has previously seemingly admitted to the magazine that she missed working with her "Outlander" season 3 co-star. However, the actress' revelation was a lot more intriguing as she sort of saying that she missed doing the intimate scenes with the actor.