Outlander” stars Sam Heughan and Caitriona Balfe were reported to be seen holding hands on the set during their downtime. This fuels speculation from fans that the chemistry goes beyond the camera.

According to the source, Heughan and Balfe always call each other 'best friends,' but it seems there is more than friendship going on. “The chemistry between them isn’t an act,” the witness said.

Heughan and Balfe enjoys platonic date in South Africa

Recently, Heughan and Balfe were seen at a rugby match in South Africa where they were filming on location for “Outlander.” Their friendly date was documented on Heughan’s Twitter which further thrilled their fans.

The “Outlander” stars were seen watching the DHL Stormers defeat the Cheetahs in 53-10 score. In the photo, the Irish actress was standing close to the 36-year-old actor with a drink on her hand. Heughan and Balfe were all smiles, oblivious to the crowd of fans wearing blue shirts.

Jamie and Claire Fraser’s romance sizzles on screen

Heughan and Balfe play the role of Jamie and Claire Fraser in “Outlander.” Their chemistry on screen is undeniable. “I think if anything, when Jamie and Claire get together again, their love is timeless and who they are inside is timeless,” Balfe said. In the upcoming season, it will be interesting to see them play their characters 20 years older. However, the 37-year old actress assures their fans that their intimacy onscreen will still sizzle.

In real life, Heughan is actually dating actress MacKenzie Mauzy. They made their relationship known when both showed up at a red carpet pre-Oscars event in Los Angeles. He feels that he should not discuss the rumors regarding the alleged dating news with Balfe. He said that, while there might be fans feeling that they were being duped or something, he and “Outlander” co-star is just doing their job.

Meanwhile, the Irish beauty is also reported to be keeping a low-key and private romance.

The Daily Mail cited a Radio Times interview where Heughan teased the fans saying that if he the affair is real, they would not divulge it at all. “I think if I and Caitriona were together, we would not say. Why would you? In this industry, we give away so much of ourselves anyway.

We talk about ourselves and we tell people stuff,” he said. Looking on the bright side, the actor thinks that they have done their job well as they were able to convince the fans of their relationship.

Viewers can expect more passionate and steamy scenes in the next season. “Outlander” returns on screen in September.