Kate Middleton was not allowed to attend Wimbledon one year for a relatable reason

"I wrote to Andy Murray afterwards saying sorry for not being there"

Kate Middleton is a Wimbledon regular, with the Princess of Wales being Patron of the All England Lawn Tennis and Croquet Club since 2016.

The Princess is spotted at the Championships every year, often joined by husband Prince William, her sister Pippa Middleton, or on two occasions her sister-in-law Meghan Markle, to cheer on that year's Brit favourite.

This year will be no exception, with the Princess of Wales expected to make multiple appearances at the tournament, starting on Monday next week. 

There was one year however that Kate Middleton was noticeably absent, with the Princess advised not to attend back in 2013.

Opening up in a royal documentary, the 41-year-old recalled not being able to go to Wimbledon and expressed her sadness at not being there to cheer on Andy Murray.

It wasn’t due to unsportsmanlike conduct or the consuming of too much Pimm's that deemed the Princess unable to attend. It was instead down to her pregnancy, with Kate discouraged from attending the Men’s Singles final, of which Murray won.

"I was very heavily pregnant with George so I wasn't able to turn up," Kate explained in BBC documentary, Sue Barker: Our Wimbledon. "I wrote to Andy Murray afterwards saying sorry for not being there, but huge congratulations."

She also went on to reveal who her mother Carole Middleton’s favourite tennis player was, explaining that she has a thing for Roger Federer.

"Roger [Federer] is my mother's heartthrob," she continued, about the close friend of the Middleton family. "I don't think she will mind me saying that! I think he probably knows that too."

The Wimbledon tennis championships starts on Monday 3 July, and to celebrate the occasion, the Princess of Wales has taken to the tennis court herself, playing a double's tournament with Roger Federer.

We will continue to update this story.