SEE PICS: David Beckham's six-year-old daughter Harper gets royal treatment!

Harper Beckham, the six-year-old daughter of star couple David and Victoria Beckham, attended a tea party with Princess Eugenie and a few friends at Buckingham Palace. The party was organised by the Duchess of York. Harper's parents showed off some images of the special day on social media, as they wished her a happy birthday on Monday, reports dailymail.co.uk. Former football star David Beckham’s wife Victoria Beckham registers her 5-year-old daughter Harper’s name as a trademark! Harper was invited with her friends to attend the extra special tea party which was held in a small drawing room last week. The little girl stood in the grounds of the palace holding a balloon for one photo. AWWW! Daddy David Beckham stitches dress for daughter Harper’s doll! PIC INSIDE She wore a blue fairytale gown to mimic Elsa from "Frozen" for the special day. Victoria shared the image, writing: "Our little birthday princess."

Our little birthday princess x Kisses ????????????????????????

A post shared by Victoria Beckham (@victoriabeckham) on Jul 10, 2017 at 12:51am PDT

She posed with her friends and Princess Eugenie, with David posting the image to Instagram.

Happy Birthday to our special little young lady ...Such a special girl who brings so much joy and happiness into our lives.. Happy 6th birthday ( I can't believe your 6 already ) have the most amazing day we love you pretty lady x ❤️ @brooklynbeckham @romeobeckham @cruzbeckham @victoriabeckham A post shared by David Beckham (@davidbeckham) on Jul 10, 2017 at 12:47am PDT

He wrote: "Lucky Harper, meeting a real-life princess at the Palace."

Lucky Harper meeting a real life princess at the Palace x ❤️

A post shared by David Beckham (@davidbeckham) on Jul 10, 2017 at 1:08am PDT

Harper's brother Cruz, 12, wrote: "Dear Harper, I can't believe it has been already 6 years. You are such a big girl so to the best sister in the world. I love you so much. Have a amazing day."

Dear Harper I can't believe it has been already 6 years you are such a big girl so, to the best sister in the world I love you so much have a amazing day ❤️❤️???????? A post shared by Cruz Beckham (@cruzbeckham) on Jul 10, 2017 at 12:56am PDT

Her eldest brother Brooklyn, 18, shared the photo, wishing her a happy birthday.

Happy birthday to my little sister. Love you so much ❤

A post shared by bb (@brooklynbeckham) on Jul 10, 2017 at 12:35am PDT

While Romeo, 14, shared another photo, writing: "Happy birthday to the best sister in the world! I hope you have an amazing day. I love you so much."

Happy birthday to the best sister in the world!!!!!!! I hope you have an amazing day . I love you so much ❤️❤️❤️❤️ A post shared by Romeobeckham (@romeobeckham) on Jul 10, 2017 at 12:47am PDT

It's not the first time the Beckhams have been at the palace. Victoria received an OBE for her contribution to fashion from the Duke of Cambridge back in April. Former England captain David Beckham was granted the same title for his services to football.