It may have been the queen’s birthday celebration, but it was a tiny princess who stole the show.

The royal family gathered Saturday to celebrate the official 90th birthday of Queen Elizabeth II. The queen's real birthday was April 21.

A photo of the royal family on the Buckingham Palace balcony observing Trooping of the Colour festivities has gone viral, but not necessarily because of the queen.

Sure, some fashionistas are raising eyebrows over the queen’s choice of a bright lime green color for her birthday outfit, complete with matching hat, but it was Princess Charlotte who stole the show.

The 13-month-old princess made her debut on the royal balcony Saturday. Looking pretty in pink, Charlotte was smiling while holding onto her mother, Catherine, the duchess of Cambridge. The royal family was looking up at the sky as the Royal Air Force performed a fly-by in the queen’s honor.

According to The Telegraph, Charlotte's older brother, Prince George, wore the same outfit that his father, Prince William, wore nearly 32 years ago.

A soldier fainted during the parade and was removed on a stretcher.