Photo: See Taylor Swift's star-studded boat ride

Taylor Swift got cozy with her beau, Calvin Harris, Sunday while on a a private tour of London along the River Thames.

The "Shake It Off" songstress was joined by her ex Joe Jonas and his new gal pal, model Gigi Hadid. Model Karlie Kloss and Swift's parents were along for the boat ride, too.

Swift instagrammed a cute pic from the trip along with the caption: "Little known fact: Karlie is secretly an unofficial historian/London tour guide. Kind of."

The night before, Swift performed at London's Hyde Park, a show that featured guest appearances by Serena Williams and Kendall Jenner.

Swift and Jonas briefly dated in 2008 -- and are apparently now pals again. She's reportedly been dating Harris since March. Hadid, meanwhile, has been spotted with Jonas ever since her recent split from Australian singer Cody Simpson.

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