But how did the partnership come about? Who asked who? And why are they so good? Express Sport take you through all you need to know.
Why is Martina Hingis playing with Jamie Murray at Wimbledon?
Hingis, at 37, is renowned as one of the best women's doubles players on the planet.
Over in the men's, Jamie Murray's reputation on the circuit is huge. He too is one of the best in the business.
So Hingis took matters into her own hands ahead of Wimbledon and she decided to suggest they team up.
Hingis said: "He's too nice a guy to approach, so I had to take the first step."
This is their first tournament playing together.
Martina Hingis and Jamie Murray (right) are in the mixed doubles final
Martina Hingis and Jamie Murray are playing together for the first time
Hasn't Martina Hingis won at Wimbledon before?
Yes – and more than once. The first of her five Grand Slam singles titles came back in 1997 at the age of just 16. (Yes, this is the same Martina Hingis!)
She went on to win three Wimbledon women's doubles titles and another mixed doubles crown, that one coming in 2015 with Leander Payes.
All in all, Hingis won five Grand Slam singles titles before going on to win 12 women's doubles slams and five in mixed.
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Marin Cilic breaks down in TEARS during Wimbledon 2017 final Sun, July 16, 2017
Marin Cilic broke down in tears during the Wimbledon final against Roger Federer.
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So why doesn't she play singles?
Hingis just wants titles. She's not happy to just compete without silverware.
When asked if she would play singles, Hingis replied: "I would rather win tournaments in doubles than play the first or second round in the single.
"I'm not somebody that just shows up to participate. I want to win."
Martina Hingis won the Wimbledon singles title in 1997
What has Jamie Murray said about Martina Hingis?
The Scot has unsurprisingly spoken fondly of his new mixed doubles partner.
He said: "She's an awesome player. She knows exactly what shot to play at the right time and she's got the ability to do what she wants with the ball. It makes it easy for me because I know she can handle herself.
"I don't feel like I'm charging around the court doing stupid stuff. She's a legend of the sport, she's won every Grand Slam except the French Open in singles and she still loves getting out there and competing."