Taylor Swift enjoys London river day out with ex

Taylor Swift has officially forgiven Joe Jonas for allegedly dumping her over the phone now that he's dating her pal Gigi Hadid.

The pop star and her current boyfriend, DJ Calvin Harris, organised a double date with Jonas and the model in London over the weekend (27-28Jun15).

The two couples and another Swift pal, Karlie Kloss, took a boat trip on the River Thames and Swift posted a shot of the quintet enjoying a day out online.

She added the caption: "Little known fact: Karlie is secretly an unofficial historian/London tour guide. Kind of."

Swift dated Jonas when they were both teenagers and turned their awkward break-up into lyrics for the songs Forever and Always and You're Not Sorry.

Jonas isn't the only ex who has inspired lyrics in Swift's songs - she has also written tracks about her romances and break-ups with John Mayer and Harry Styles, among others.