Kristin Cavallari was spotted sharing a "long kiss" with Jeff Dye during a recent date

An eyewitness told Us Weekly: "At one point during the intimate dinner, Kristin was seen leaning into Jeff and giving him a long kiss.

"The couple had a very upbeat night with a lot of laughs."

The celebrity duo subsequently shared a laugh with two guys at the bar, one of whom Kristin previously dated.

The source said: "When Kristin used the restroom, Jeff only had eyes for her at the trendy spot."

But despite their smooch, Kristin isn't looking for a serious, long-term relationship at the moment.

The insider added: "Kristin and Jeff just have a casual dating situation going on. She’s not in the zone to move forward with a full-blown relationship of that level and is just keeping herself preoccupied and having fun."

Kristin - who has Camden, eight, Jaxon, six, and Saylor, four, with Jay - announced her split from her husband via an Instagram post in April.

The TV star insisted they still have "love and respect for one another", but she also admitted that they'd grown apart as people.

Kristin wrote on the photo-sharing platform: "With great sadness, after 10 years together we have come to a loving conclusion to get a divorce. We have nothing but love and respect for one another and are deeply grateful for the years shared, memories made, and the children we are so proud of. This is just the situation of two people growing apart. We ask everyone to respect our privacy as we navigate this difficult time within our family."