He's been dating pop megastar Taylor Swift for nearly five years.
And Joe Alwyn, 30, was pictured kissing co-star Alison Oliver on the set of BBC drama Conversations With Friends on Monday.
They were pictured cosying up together in a BMW for a kissing scene in a car park in Bray, Ireland.
Look away, Taylor: Swift's boyfriend, Joe Alwyn, 30, has been spotted kissing co-star Alison Oliver on the set of Conversations With Friends in Ireland on MondayInsurance Loans Mortgage Attorney Credit Lawyer
New series: The British actor stars as Nick in the upcoming drama which is based on Sally Rooney's 2017 novel of the same name
The British actor stars as Nick in the upcoming drama which is based on Sally Rooney's 2017 novel of the same name.
His co-star will play Frances, who embarks on a love affair with his character Nick.
Alison is an up-and-coming actress who graduated from Lir Academy in Dublin, Ireland in 2020.
Long-term lovers: Taylor and Joe have been dating since 2017, survived isolating together during the pandemic and even co-wrote two songs together on Swift's hit 2020 album Folklore, (pictured in October 2019)
Joe, who is in a relationship with singer Taylor Swift, has had success in the likes of Oscar-winning film The Favourite and Billy Lynn's Long Halftime Walk.
He also won a Trophée Chopard at the 2018 Cannes Film Festival.
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Co-stars: Joe has had success in the likes of Oscar-winning film The Favourite and even won a Trophée Chopard at the 2018 Cannes Film Festival, whereas Alison has just graduated from Lir Academy in Dublin, Ireland in 2020
The upcoming series follows a mysterious married couple, Nick and Melissa (Jemima Kirke), and their attraction to two younger women, Frances and Bobbi.
Meanwhile, Frances tries to reconcile her feelings for best friend and ex-girlfriend Bobbi, played by Utopia actress Sasha Lane, 25.
Sasha made her film debut in 2016 film American Honey, she also starred as Jessica Hyde in Utopia.
The new series comes after the success of Rooney's 2018 novel Normal