Joe made his feature-film debut as the title character in Ang Lee's Billy Flynn's Long Halftime Walk a year ago.
Around the time of its release last November, Swift, 27, was spotted at a Hollywood screening for the war drama with her mom and a group of friends.
Taylor Swift has finally moved on from Tom Hiddleston - and it's another British actor.
This is published unedited from the PTI feed. She's also rented a house in London to see her new man and has been treating her arrival to the country with a "military-like" precision, employing private jets and a security detail to make sure that no one sees her. Joe Alwyn is Taylor Swift's new boyfriend according to multiple media reports.
Swift has been reportedly going to great lengths to hide her romance, spending "days at a time" in London while wearing a variety of wigs in order to disguise her appearance.
The singer has is said to have been dating the rising star for the past few months, but had managed to keep details of their relationship on the down low. "But after what happened with Tom Hiddleston, they were determined to keep it quiet", a source explained.More news: Guam residents cast wary eye at North Korea after launch
It all began in 2009, when Kanye West made headlines all over the world by he interrupting Taylor Swift's acceptance speech at the MTV VMAs.
It's believed that Joe - who lives with his parents - is just as keen as Taylor to keep their relationship under wraps in public, despite their family and friends having reportedly been aware of it for a long time.
'This isn't a new couple alert or a secret relationship, ' a friend said. "She is really excited about her new music and can't wait to share it with her fans", the same source added.
Joe Alwyn attends the Gala screening of "The Sense of an Ending" at Picturehouse Central on April 6, 2017 in London, England.
Joe, 26 is a London theater actor with just a few film credits to his name, although he is slated to appear in the upcoming film, "The Favourite" with Oscar-winning actress Emma Stone.