Zoë Kravitz and Harry Styles confirmed their romance while trying to fly under the radar Wednesday.

While on a low-key walk in the Brooklyn, NY, neighborhood of Williamsburg at 2:30 p.m. ET, the movie star and “As It Was” singer were spotted by a fan throughout a three-minute period packing on the PDA.

“They were holding hands and laughing together, like, very casual,” the spy exclusively tells Page Six. “He was making some joke. He leaned his head back, looked up and she was laughing.”

The fan says it was clear Kravitz and Styles are “definitely a couple.”

We’re told it appeared the “Blink Twice” director and One Direction member — who were “comfortable” around each other — did not want to be noticed because they had “not wanting to be seen energy.”

“Williamsburg at this time — it

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