Sam Heughan Caitriona Balfe Dating: ‘Outlander’ Stars Accused of Cheating on Mackenzie Mauzy

New photos of "Outlander" Season 3 have been released to the public. The images show more intimacy between stars Sam Heughan and Caitriona Balfe. It seems the photos have led some fans to accuse the pair of cheating on Heughan's girlfriend, Mackenzie Mauzy.

According to the latest rumors, Sam Heughan and Caitriona Balfe seem to be closer than ever. Their chemistry on television is already too obvious and some viewers think they are more than friends. This is some big news since Heughan is already dating Mauzy.

Blasting News notes that there are still a lot of things that fans do not know about Sam Heughan and Caitriona Balfe. Some scenes don't make it to the small screens. Aside from this, there's also the things that happen behind the scenes.

The outlet goes on to point out that Sam Heughan and Caitriona Balfe are really close even outside the "Outlander" set. They exchange "flirty" tweets and appear to be very comfortable with each other. This has further caused some fans to think that the pair may be cheating on Mackenzie Mauzy.

If the rumors are true, it may not play well for the PR stunts of "Outlander." Fans love Sam Heughan and Caitriona Balfe on TV. However, finding out that they are cheating behind Mauzy's back will mean bad PR for the extremely popular series.

Amid all the rumors, Sam Heughan and Caitriona Balfe were joined by Mauzy during the former's birthday celebration. Balfe herself posted the photo of Heughan and Mauzy during the event. It appears that things are going well between the couple.

According to Just Jared, Sam Heughan turned 37 on April 30. Caitriona Balfe and Mauzy were present during his special day. It is unclear if other "Outlander" stars were present during the party.

Sam Heughan and Caitriona Balfe appear as Jamie and Claire on "Outlander" Season 3. Stay tuned for more news and updates on the on-screen couple.