Harry Styles and Kendall Jenner are back! Reportedly, Kendall Jenner flew to London to celebrate her alleged beau's 20th birthday. Though it could be assumed that Kendall Jenner was in London to take part in the London fashion week, according to reports by the Daily Mail, Hendall came back with a bang when the 18-year-old model went out of her way to celebrate the belated birthday of the One Directioner.

"They are throwing Harry a belated 20th birthday party. It's a sign of how far their relationship has come that she and Nick, one of Harry's closest friends, are doing it together. They have many surprises planned," a source revealed to DailyMail, as quoted by entertainmentwise.com.

Apparently, Kendall has taken help of a common friend to throw a belated birthday bash to Harry at The Box, Soho. Kendal was seen arriving in London on Friday after raising temperature with her nipple-baring fashion walk at the Marc Jacob's show at the New York Fashion Week.

The Jenner sister was seen taking the stage in a sheer top and brown trousers with bleached hair and eyebrows. This is one of the boldest step Kendall has taken quite early in her career and she did receive flak for it. However, sister Kim is in full support of her step sister and she tweeted:

Proudest sister ever!!!! @kendalljenner I love watching you live your dream! #MarcJacobs #NYFW http://t.co/LxdocQ4mbQ

— Kim Kardashian (@KimKardashian) February 14, 2014

Meanwhile, Harry Styles' birthday was on Feb 1, and the sparks flew that Kendall threw a quite birthday bash for Harry at her father Bruce Jenner's house.

"Kendall was really keen to make Harry's birthday a memorable one. Her dad owns an incredible clifftop holiday home in California with amazing views and he let them have it to themselves," an insider told Star magazine, as quoted by entertainmentwise.com.

"The secluded house is perfect for them to spend quality time together. Harry had a great time away from the limelight and Kendall made sure she doted on him. He's not a teenager anymore so he wanted a more mature celebration," the source added.