Well, when Meghan Markle met sister-in-law Kate for the first time, she certainly made a winning choice.
According to reports, the first time Prince Harry introduced his then-girlfriend Meghan, to Prince William and Kate, it was around the time of Kate's 35th birthday.
And Meghan didn't turn up empty handed.
Apparently, Harry and Meghan popped over to Kate and Will's apartment in Kensington Palace, and during the meet, Meghan presented Kate with a very thoughtful gift.
"Meg had bought Kate a small birthday present – a very smart leather-bound ‘dream diary’ for her thoughts and ideas which Kate loved," revealed a pal.
And with Meghan's birthday this weekend, it certainly seems The Duchess of Cambridge has a lot to live up to.
The Duke and Duchess of Cambridge - who are currently in Mustique - are reportedly returning from their holiday early to attend the nuptials.
Kate, if you're struggling for any last minute gift ideas, we've put together a handy list.
Anything from Aquazzura
Meghan's a huge fan of Aquazzura's designs.
Not only did she wear a custom-made style at her and Harry's wedding reception, but all six of Meghan's bridesmaids wore custom Aquazzura pumps on the big day (each monogrammed with their initials and the wedding date).
Even Meghan's mum, Doria Ragland opted for one of their designs while watching her daughter become a royal.
We're certain a pair of these would be a safe bet for The Duchess.
A calligraphy kit
Alongside her acting career and before she became a royal, Meghan used to be a calligrapher.
She also loves handwritten letters and cards, and we bet she'd be impressed with a snazzy calligraphy set to continue her hobby.
"I used to be a calligrapher for weddings and events - that was my side job while I was auditioning," she told .
"I think handwritten notes are a lost art form. When I booked my first pilot, my dad wrote me a letter that I still have. The idea of someone taking the time to put pen to paper is really special."
Her favourite perfume
In 2016, Meghan revealed her love of perfume to the , explaining two of her favourite fragrances are "Oribe Cote d'Azur Eau de Parfum" and "Wild Bluebell" by Jo Malone.
"Fragrance is my favourite thing," she explained.
"So much so that if I leave the house and I don't put any on, I'll turn around and go back home."
A Givenchy bag
Like Aquazzura, Meghan definitely has a soft spot for Givenchy.
Not only was Meghan's wedding gown designed by Clare Waight Keller for Givenchy, but the royal has worn the designer's pieces on several occasions since.
We think The Duchess would be happy with anything Givenchy - but has Meghan's style written all over it.
A lifetime supply of Tignanello wine
Any meg-a Markle fan will know that the royal's blog, The Tig, was named after her favourite tipple: Tignanello wine.
Meghan once revealed one of her "vices" was wine - and her and Harry reportedly during their trip to Dublin last month.
"French fries and vino are my vices," Meghan told .
Who wouldn't be happy with a lifetime supply of delicious wine?