Bella Hadid turned 21 on Oct. 9 this year and BFF Kendal Jenner posted a picture of her as a tribute to their friendship.

Hadid and Kendall have been friends for almost seven years now and have had their share of fights just like other fashion models and celebrities. However, this birthday Kendall revealed her love for her best buddy wishing her on her Birthday on Monday.

She Posted a picture of Bella's sun-kissed look in celebration over her official Twitter page.

Kendall and Bella were also teenage internet friends according to Instyle. The former had claimed that she met the latter over twitter. They were around 14 years of age as they met up over sushi. "Now we are best friends, she's a pretty significant human I met online," revealed Kendall, a month ago.

In an Interview, a few months ago, Kendall had opened up about how close Bella was to her than Gigi. "Gigi and I just started getting close when we started modeling, but Bella and I were actually really good friends since high school and hung out every day in school before either of us started working," she said. Kendall had even shared plenty of pictures flaunting their closeness to each other. In one such post she referred to Bella as her "Baby Girl."

my baby girl A post shared by Kendall (@kendalljenner) on May 2, 2017 at 5:29pm PDT

The American fashion model went on to reveal about her famous friendships and said that she has actually been friends with Bella Hadid from a longer period of time than her sister Gigi. Although it was Gigi who met her on the fashion circuit Kendall was drawn to Bella, reported Hyper Bazaar. Meanwhile, Gigi took to twitter wishing her sister for her birthday." TOMORROW WILL BE 21 YEARS SINCE I MET MY FOREVER BESTIE bellahadid  (me wearing all red on... https://www.instagram.com/p/BaASDwpgr3O/ ," she wrote ahead of the celebration.