For example, Cressida's favourite accessory? It's a scarf from British brand Lily & Lionel, and it's particularly special to Prince Harry.
The Daily Mail reports that Cressida was seen wearing the £180 scarf on a recent shopping trip to the Kings Road. It's significant to both her and her boyfriend because the limited-edition design was made in aid of Harry's charity Sentebale.
A sign of true love? Yep, and she's supporting a brilliant cause too.
And if you're wondering what Harry's been getting up to lately, he's currently on a charity trek to the South Pole. All that hanging out in a fridge must be coming in handy...