FANTASTIC Four's Pedro Pascal and Vanessa Kirby have left fans confused over their close friendship – though the reason behind it is actually quite sweet.

Videos of the pair's tactile relationship, often cuddling up to each other, holding hands and Vanessa even stroking Pedro's neck, has started circulating online causing debate on X.

Vanessa and Pedro play married couple Reed Richards and Sue Storm – AKA Mr Fantastic and the Invisible Woman – in the new addition to the Marvel universe.

And their friendship clearly extends outside the show, with the duo seen showing each other support on tour.

However, some fans have taken exception to their affectionate friendship, complaining it is "weird".

Vanessa has noticeably become a particular source of support for Pedro, starting back at San Diego Comic-Con last year when they took to the stage alongside co-stars Joseph Quinn and Ebon Moss-Bachrach.

A nervous-looking Pedro grabbed Vanessa's arm as he appeared on stage behind her, and in response she grabbed his hand and held it.

Speaking with Vanity Fair in June this year, Vanessa praised her co-star explaining they were both as nervous as each other and their affection is a sign of unity.

She said: "What happened is we were both incredibly nervous going out in front of thousands of people who love this comic.

“He wanted me to know that we were in this together, and I found it a lovely gesture and was very glad to squeeze his hand back.”

This is something the pair have been doing in the months since, especially as they've been sent around the world to promote the movie.

Often paired up on the press tour due to their characters' relationship, Vanessa has been seen soothing Pedro with hugs and physical affection.

He has also been seen resting a hand on Vanessa's pregnant belly on red carpets, following news she is expecting her first child with her partner, American lacrosse player Paul Rabil.

Pedro has previously stated that touch helps soothe him when he suffers from anxiety – even notably doing it to himself while on the red carpet alone, creating a unique pose by standing with his hand on his chest.

During a screening event of his Sky/HBO series The Last of Us in 2023, Pedro told co-star Bella Ramsey during an interview with Deadline: "You know why? It’s because my anxiety is right here."

In response, Bella posed on the carpet with him in the same manner.