Ashton Kutcher, Mila Kunis can't stop laughing during viral couples quiz

Ashton Kutcher and Mila Kunis put their relationship to the test this week, taking part in a viral social media trend.

Kutcher, 44, took to TikTok on Wednesday to share a hilarious video of himself and Kunis, 39, taking a quiz targeted at couples -- and neither of them could contain their laughter.

"Grandma and Grandpa hopped on a trend 3 months late," he wrote in the caption. "But it made us laugh."

The popular trend sees couples responding to relationship-based prompts by either pointing to themselves or their partner to indicate who best fits a certain descriptions, such as "Who's more spoiled?" or "Who said I love you first?" Sometimes participants in the trend will cover or close their eyes so they don't see how the other person is answering, as the former "That '70s Show" co-stars did in their video.

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Perhaps the cutest moment was when the pair both quickly agreed that Kutcher said "I love you" first. Other aspects about his personality that they agreed on were that he is "more patient," "works out more," is the "better singer" and "requires more attention."

For Kunis, the couple agreed that she is "a bigger baby when sick," "has more clothes" and "is never wrong." They also agreed that she "eats healthier" but is also "more annoying when hungry."

The couple couldn't agree on "who drives better," who "spends the most money," who is "more spoiled," who "apologizes first after a fight," who "eats more" and who is the "funny one."

Kunis and Kutcher were married in July 2015 and have two children together.