The Great Gatsby star graces the cover of next month's Vogue—looking positively gorgeous, we might add—and Miller was asked to give some insight on the notoriously private star and Mumford & Sons frontman.
"They both come from very solid families and have a real sense of the life they want to live," the blond fashionista explained, adding that the thing she loves the most about Mr. and Mrs. Mumford is "their normalcy."
"They have chickens and a dog, and roasts and friends, jams by campfires. It's sort of idyllic. Marcus can headline Glastonbury and Carey can be nominated for however many Oscars, and then they come back to their farm, and they're in big woolly jumpers and funny hats, raising piglets. It's an amazing balance they've managed to strike. I can't wait for a little baby to come along."
Awww, now how's that for a stamp of approval!
Mulligan kept relatively mum on her married life, but did give some insight on how she and her husband are able to balance their hectic, rather public careers.
"Like anyone, you try and split your time evenly," she told the fashion bible. "Marcus is the only thing that's mine that I can keep totally away, so I try to."
And as far as the Brit beauty is concerned, keeping the cards close to her chest is crucial to her acting career.
"I have always felt that the less people know about me, the better," she admitted. "The more similar you look job to job, the more they relate to you from your previous roles…That's why I've done loads of really stupid things to my hair in the past to try to not look the same."