But while their relationship is undoubtedly adorable, they've had their tough moments. Like when Kit left a model of Jon Snow's severed head in their fridge as an iconic but extremely intense April Fools' prank.
Did he do it again, you ask? Of course he did!
During an appearance on Late Night With Seth Meyers on Monday, Kit explained how this year's significantly less intense prank ended up completely backfiring on him.
To be clear, he described the prank as "the most first-world April Fools'" before explaining that it all had to do with Rose's favourite kind of almond milk.
But, Kit said, the prank actually ended up backfiring on him.
And Rose really got her revenge on Kit (and his bank account) for that severed head trick.
I guess we'll just have to see what they cook up next year.