Zara Tindall is celebrating her 44th birthday today (Thursday, May 15), and royal fans have uncovered a sweet little detail about her relationship with husband Mike Tindall—a one-word nickname he’s long used to describe her, and its touching meaning.

The daughter of Princess Anne is likely marking her special day with her husband, former rugby player Mike Tindall. And now, fans are revisiting a charming moment between the couple that surfaced in a YouTube video from 2023, when Mike shared a unique term of endearment he’s always used for Zara—though it’s far from a traditional pet name.

In the opening of an episode of Mike Drop, Mike’s podcast with Magic Millions, he asked Zara if she was looking forward to joining him on the show. Her response was a cheeky “no.”

Mike laughed and said, “You know how in depth it’ll be. You’ll be scraping through the layers.”

“I’ve always described you as an onion,” he added. “Lots of layers, so we’ll try and peel back a few today, shall we?”

This lighthearted exchange follows recent comments Zara made about the challenges even royal families face. Speaking candidly at a London Sporting Club lunch last week, she said, as quoted by The Sun:

“It is very hard to see from the outside but, 100 per cent, it is a family that is still going through the same struggles other people do.