Eyewitness Reveals Details About John Mayer & Kiernan Shipka's Dinner Together

An eyewitness told ET that once inside the restaurant, the pair spent around four hours “hanging out.”

The eyewitness also claims that at one point, John, 45, serenaded Kiernan, 22, after having “a few drinks” and that they seemed “very much into each other during their time together.”

More interestingly, when their night ended at around midnight, they apparently left separately in separate vehicles. However, a few blocks away, their cars pulled over and allegedly, Kiernan got into his SUV.

If you didn’t see, an unexpected celeb used to live with Kiernan!