Dakota Johnson is single and ready to mingle, but there’s one deal breaker she won’t tolerate in future prospects.

The “50 Shades of Grey” actress, who recently split from her longtime love, Coldplay frontman Chris Martin, raised her biggest red flag in a Q&A video with Vogue Germany, shared on Tuesday.

“Men who wear flip-flops in public. Run,” Johnson said in his characteristically direct way.

Johnson previously revealed another non-negotiable date earlier this summer while doing press for her film “Materialists,” in which she plays a matchmaker.

“Aren’t you an idiot?” the 36-year-old said during a morning appearance on the “Today” show, as host Craig Melvin seemed a little surprised by Johnson’s response.

“That’s concise!” Johnson’s co-star Chris Evans joked. “There it is. Nail on the head.”

“Nail in the head,” Melvin agreed. “And we’ll probably have to clean that up to feed the West Coast. That’s fine.”

The key to Dakota Johnson's heart? No flip flops.
The key to Dakota Johnson’s heart? No flip flops.

Michael Loccisano via Getty Images

Johnson and Martin split in June of this year. The two have been dating on and off since 2017, although this could be their last breakup.

“This time it seems final,” a source shared with People magazine.

Neither the actor nor the musician have been linked to anyone after their separation.

Although in a conversation with Deadline about filming the movie “Materialists,” Johnson said he learned through conversations with the film’s director, Celine Song, that “dating sucks.”

“I don’t have personal experience, but I know from friends of mine that trying to find your person is just hard,” she shared in July.

“It’s beautiful and scary, and I think it makes every human being question their worth, which is sad,” Johnson said. “Some dating apps are amazing, and I know people who have gotten married and are very in love with them, and people who have been set up by friends or matchmakers. There is no right or wrong answer to love.”