This morning, when you're having bacon, sausage and glasses of milk for breakfast, Jay Z and Beyoncé won't be joining you.

That's because they've decided to go vegan - until Christmas day, at least.

On Life + Times, the New York rapper wrote a note expressing his desire to complete the challenge and the reasons for their decision to take it up:

"This all began a few months back when a good friend and vegan challenged me to embrace a "plant-based breakfast" everyday. It was surprisingly easier on me than I thought... Why now? There's something spiritual to me about it being my 44th birthday and the serendipity behind the number of days in this challenge; 22 (2+2=4) coupled with the fact that the challenge ends on Christmas day...It just feels right! So you can call it a spiritual and physical cleanse. I will post my progress ... I don't know what happens after Christmas. A semi-vegan, a full plant-based diet? Or just a spiritual and physical challenge? We'll see... Best of luck and health!"

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