In a video posted to Instagram, the pair jumped on the couple questions challenge that first went viral on Tiktok back in 2020.
Kutcher captioned the playful video, "Grandma and Grandpa came into the game 3 months late.
Kutcher, 44, is the patient in the relationship, while Kunis, 39, has the most clothes and Kutcher is the better singer.
The "Two and a Half Men" actor had said "I love you" before, going to the gym more often and both needed more attention.
They were unable to agree on who was the better driver, the funnier partner, who makes the most money.