FameFlynet; Inset: Jason Merritt/Getty
June 30, 2015 03:20 AM

Power pair Angelina Jolie Pitt and Brad Pitt rendezvoused with musician pal Chris Martin at a recording studio across the pond.

The meet-up sparked buzz that the trio could be working together on the music for Jolie’s next big directing-writing project By the Sea, which also stars her husband. But before fans get too excited, it turns out the stars were just enjoying a friendly visit, a source tells PEOPLE.

The Mr. and Mrs. Smith stars were photographed heading into London’s well-known Air Studios in Hampstead on Sunday, the Coldplay frontman nearby sporting his signature smiley-face cap.

Jolie Pitt, 40, donned a chic business look, complete with dark aviator sunglasses, nude heels and a sleek ponytail. The Fury actor, 51, was spotted in a white button-down and glasses, rocking a goatee and longer locks.

The couple have certainly been enjoying some quality family time in London. Some of couple’s children attended Taylor Swift‘s recent concert at Hyde Park – the very same show where Martin’s ex, Gwyneth Paltrow, took their son, Moses.

The Pitts are longtime friends of the “A Sky Full of Stars” singer, 38, who penned an original song for Jolie Pitt’s directorial project Unbroken.

The English artist famously joked about how the Pitts got him on board for the 2014 film, telling New York magazine last year that the couple kidnapped him in the process.

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“I got a message that said, ‘Meet in this undisclosed location. You’ll be blindfolded and picked up by seven ex Navy SEALs,’ ” Martin said in December. “So they kidnapped me, hit me over the head, and sprayed me with Mace. When I woke up, I was in an office, and Brad Pitt was doing push-ups as Angelina Jolie was just sitting there with her crown on. There was also a guy holding a knife to my throat, and she said, ‘Write me a song, or else.’ And Brad Pitt said, ‘Yeah. What she said.’ ”

Martin’s tune “Miracles” played during the credit roll at the end of the Louis Zamperini biopic.

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