The Wimbledon winner's agent announced the happy news, and it's thought Andy popped the question last Wednesday, reports the BBC.
Speculation about when the couple would marry has been whirling for a long time, as devoted - and a very stylish Kim - has been spotted supporting Andy at matches for years.
Earlier this year, Andy fanned the flames when he joked that he would marry Kim after Wimbledon.
He took to Twitter not long after and told his followers, "3 things.. I don't smoke grass, I'm not getting married( yet) and I don't want to kill Rafael Nadal."
Ms Sears was born in Sussex and is the daughter of former Lawn Tennis Association head of women's tennis Nigel Sears.
Kim met Andy at the US Open in 2005 and love blossomed from there.
According to the Independent, the happy news comes with some not-so-exciting news, with the engagement being revealed on the same day he announced the ending of his two longest partnerships in tennis.
The paper says that Dani Vallverdu, one of Murray's best friends and a key part of his coaching team, and Jez Green, one of his two fitness trainers, have both parted company with the tennis ace, who is currently the world no 6.
Anyway, back to the good news. The Mirror reports that Andy chose the ring design himself, adding, "Kim said 'yes' immediately. They are completely besotted with each other and have been there for each other through thick and thin.
"They are just going to enjoy themselves before they start planning their big day."
We literally can't wait to see Kim's wedding gown, as she'll no doubt look amazing.
Game, set and (love) match. Congrats to the soon-to-be newlyweds.
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