Before Tinder became a dating app phenomenon, Mila Kunis, oddly enough, was testing it out for her fiance Ashton Kutcher.

The "Jupiter Ascending" star told Jimmy Kimmel on Tuesday that Kutcher was approached to invest in Tinder, and, like many other tech projects he's approached with, he asked her to play around in the virtual world.

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"I was like, 'What is this?'" she recalls. "I was swiping left and right! This is amazing!"

She adds of her beau, "This is what I do at home. He makes me go on all of these websites."

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Kunis didn't stop with Tinder. She also admits that she tested out the dating site's accompanying app Grindr.

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