Adios teenage years, Harry Styles is now 20-years-old.

On Saturday, February 1st, One Direction’s Harry Styles entered his 20s. So how does a young boybander celebrate such an occasion? With his celebrity girlfriend, family and friends, of course!

Styles’ rumored girlfriend, Kendall Jenner, has gone out of her way to make Harry’s 20th birthday bash a memorable one.

One insider told The Daily Star, “Kendall wanted the party to be in London so that Harry’s friends and family could all be there. The rest of One Direction and a whole host of other celebs will be on the guest list. It won’t be a tame affair, and Kendall will pull out all the stops to make sure it’s a night to remember.”

And though the party may stop there for family and friends, it will continue for Styles and Jenner.

“Kendall’s dad has a beautiful cliff-top holiday home in Big Sur, California, and she has asked if she and Harry can use the mansion for a private break together. She wants them to have some time alone where they can relax and enjoy each other’s company. Harry already has everything he wants, so she decided to organise something special they can always remember,” added the insider.

After such a birthday celebration, what on earth will Jenner do for Valentine’s Day?

Styles took to his Twitter to let everyone know what he was doing on this special day and how turning 20 made him feel.

Just sitting around being 20.

— Harry Styles (@Harry_Styles) February 1, 2014

I feel olllllllllllldddddddddddd.

— Harry Styles (@Harry_Styles) February 1, 2013

The birthday boy also thanked those who donated to the Believe in Magic charity for his birthday.

Just saw donations to @believeinmagicx for my birthday. Thank you.. You're all very very kind and nice .xx

— Harry Styles (@Harry_Styles) January 31, 2014

Many fans took to Twitter to wish Styles a Happy Birthday.

Happy Birthday, @Harry_Styles! Here's a picture from when Harry & @OneDirection were on @iCarly!! #HappyBirthdayHarry pic.twitter.com/HDFIMqCLnR

— Dan Schneider (@DanWarp) February 2, 2014

HAPPY BIRTHDAY @Harry_Styles Welcome to the 20s! Only 1 more year until we can get a drink together in the US -A

— 1D Updates (@1DWorldStalk) February 2, 2014

my 4000th tweet goes to harry wishing him a happy day for no longer being a teen #20 #iloveyoubabe @Harry_Styles pic.twitter.com/cwAgvtmSFy

— Ashleigh Pixberg (@ashleighpixberg) February 2, 2014

Even Styles’ mom and sister got in on the action of wishing him a “Happy Birthday” on Twitter.

I have watched my boy grow into a mature, well rounded young man who never fails to impress me & makes me … http://t.co/mYYEME7dMk

— Mama Twist (@MrsAnneTwist) February 1, 2014

Her tweet continues, “…incredibly proud each & every day. Happy Birthday @Harry_Styles.”

Happy birthday to a super cool not-so-baby bro Miss you see you soon @Harry_Styles

— Gemma Styles (@GemmaAnneStyles) February 1, 2014

Even though Jenner is going above and beyond for Styles’ birthday, is she the next Yoko Ono? One “source” may want you to think that Jenner is causing a rift between Harry and the other One Direction guys.

A source told OK! magazine, “Kendall’s a sweet girl, but they [the One Direction boys] see her as a bigger threat than Taylor Swift ever was. Kendall seems to have cast a spell over Harry, and it’s disrupting other areas of his life because he’s always wanting to spend time with her or chat with her on the phone when they’re apart. It’s causing a lot of unrest.”

The source adds that Jenner may already be causing problems between Styles and his fellow bandmate Niall Horan. Said the source, “[Harry] seems to be losing interest in the band. The other day, Harry and Niall almost [fought] when Niall confronted Harry when he showed up to a meeting.”

Which do you believe? Is Kendall a great girlfriend, or is she bad for the band? Or do you even care?

Image via Styles’ official Twitter account.