Credit: Instagram

They may be competitors in the Dancing With the Stars ballroom, but in real life pro dancers Sharna Burgess and Peta Murgatroyd are the best of friends, as they proved again this weekend when Peta turned out to celebrate Sharna's birthday.

On Friday, June 21, Sharna celebrated her big day at — appropriately enough — Season 16 star Lisa Vanderpump's restaurant, Sur. She was surrounded by 10 of her closest friends, including Peta.

Peta posted this photo of herself with Sharna on her Instagram, writing, "Happy Birthday to my girl @sharnaburgess I love you so much!!! Blessed to have u in my life xox."

Aww!

If you're wondering why Peta and Sharna are so close, it's because they've know each other for a long time. As Sharna explained to us, "I've known [Peta] since I was, oh, 20, living in London and competing, when we were both competing on the same circuit together." Not only that but the pair "danced on Burn the Floor together for a long time. About six years, actually."

It's always nice to see the pros hanging out together outside of the show. Happy b-day, Sharna!

Source: Instagram

Rebecca Martin is an editor at Wetpaint Entertainment. Follow her on Twitter @BeccaDMartin.