American dancer and actress, Maddie Ziegler just celebrated her 15th birthday, and fans of the accomplished teenager had taken to social media to wish her well. However, her little sister Mackenzie Ziegler stole the show with her own special birthday greeting.

Mackenzie took to Instagram to share an adorable photo of the two sisters posing together and smiling for the camera in their cute outfits amidst a light pink backdrop. The caption stated "happy bday bestfriend i can't even believe you are already 15!! even tho we fight sometimes you are the most down to earth person i know. here are some videos that make me laugh lol. love u lots."

This personal greeting was adored by fans everywhere. Mackenzie reminded everyone that her big sister may be a celebrity at such a young age, but is still humble deep down. In a report by Just Jared, Mackenzie did not stop at sharing a photo with a thoughtful caption, but went as far as posting reminiscent videos of them spending time together. The two sisters are obviously very close, and it is nice to see Mackenzie being very supportive of her older sister.

While Maddie is busy with multiple projects, Mackenzie has been doing some work herself. According to People's Choice, Mackenzie is getting prepared to go on tour with Johny Orlando after briefly taking a well-deserved break. Not only is Mackenzie a talented dancer like her older sister, but she has some promising singing chops as well. She is looking forward to performing in front of audiences once more. The tour called "Day & Night" begins on Oct. 28 in Pittsburgh Pennsylvania.

In the last week of September, both Mackenzie and Maddie proved that they were also socially active. They helped launch the event for the non-profit youth organization "Positively Social," which was founded by Jack Buckingham. The advocacy of the organization aims to lessen the instances of social media bullying and hacking, which is a prevalent problem in this day and age. The sisters joined other young celebrities as well to promote the good cause.