Alison Brie and Dave Franco bonded over their love of cats.

Dave Franco

Dave Franco

The '21 Jump Street' star knew the 'How to Be Single' actress was the one when she let him move his cats into her apartment.

Speaking on The Late Late Show with James Corden, he said: "At one point I was the single guy who had two 17 pound cats. That's not the most enticing thing for most girls. So, my cats essentially weeded out like 95 per cent of my potential mates. And ultimately I met Alison, she is a cat lady, thank God.

"At one point I went up to her and was like, 'I know were not officially living together but can I move my cats into your place?' She was up for it ... and I think that was the moment I knew I would marry this woman!

"[Now] It's usually the two of us with our 17 pound cats in bed watching either a documentary or 'The Best Exotic Marigold Hotel Part Two.'"

Meanwhile, Alison and Dave - who got engaged in August 2015 - have considered eloping.

He shared previously: "We keep kinda paring it down - to the point we might elope. Who knows? I don't need a big wedding. I don't want a big wedding."

And Alison recently gushed about her "incredible fiancé" but admitted there was a time when she never wanted to get married.

She said: "I have an incredible fiancé. He's so wonderful. He's just the sweetest man I know. And he's so funny and incredible in every way ...

"I never wanted to get married. I was just like, 'Well that's not my path in life, because I'm choosing this crazy lifestyle.' Then, you know, I fell in love. So, blah blah blah, amazing. Acting is fulfilling, but it's also not the only thing."