Ashton Kutcher and Mila Kunis were spotted holding hands as they grabbed lunch on Sunday in Hampstead with Princess Beatrice's boyfriend David Clark.

The actress is currently in the UK shooting for her film "Jupiter Ascending" which also stars new dad Channing Tatum.

While heading to lunch Kunis decided to wear black leather pants, a black top, black flats, and a black and white bouclé jacket paired with dark sunglasses, according to the Daily Mail.

Under a grey wool coat Kutcher wore an olive pull over hoodie with beige pants, black shoes and a brown hat. Clark also kept things casual with a pair of jeans, blue jacket, and black shoes.

[To see photos of the trio out to lunch click HERE]

Kutcher became friends with Clark when he was chosen to take a trip into space on the Virgin Galactic, the princess' boyfriend works in Astronaut Relations at Virgin Galactic

The Daily Mail report that "ever since Ashton was chosen to become the 500th space traveler on the Virgin Galactic last year, he's become friends with Dave, who is head of astronaut relations.

"It isn't just a superficial friendship, they get on really well, as Dave introduced Bea to Ashton and Ashton introduced Mila to them. 

"Mila is impressed with the royal family, respects their tradition and watched every minute of Kate and Wills' wedding, so being friends with Beatrice is a total head-trip."

Kutcher's space travel was revealed when Virgin CEO Richard Branson announce it on his blog.

The Daily Mail reported that the mogul wrote, "I gave Ashton a quick call to congratulate and welcome him. He is as thrilled as we are at the prospect of being among the first to cross the final frontier (and back!) with us and to experience the magic of space for himself."

No details have been released as to when Kutcher's flight into space will take place.

For more Ashton Kutcher and Mila Kunis news click HERE.