Zara Phillips and Mike Tindall enjoyed a low-key night out with Louise and Jamie Redknapp on Tuesday evening.
The four friends chose London's Mahiki nightclub to catch up after a busy summer.
Louise and Zara opted for a casual look, with minimal make-up, jeans and high heels for just a touch of glamour.
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Both women worked together on the 2012 Sports Relief campaign and seem to have formed a bond since then.
Louise went on a mission to Uganda and Zara starred alongside Sir Steve Redgrave in a spoof video for the London 2012 Olympics.
The Queen's granddaughter went on to win a silver medal in the Games as part of Team GB's equestrian outfit.
Meanwhile, sportsmen Jamie and Mike have plenty in common, having both represented their country for their respective sports, rugby and football.