Johnathon Schaech isn’t kissing and telling about his recent makeout session with ex-wife Christina Applegate.

A solo Schaech, 38, hit the Maxim launch party of the new Assassin’s Creed game at Hollywood hot spot Opera Tuesday night.

When asked about Us’ recent report that he and Applegate, 35 — who split in December 2005, amid allegations she cheated on him — smooched at L.A.’s Les Deux November 3, he laughed and replied, “No comment.”

When pressed further about whether they were friends again, Schaech smiled again and said, “No comment.”

On the November 3 night in question, Applegate sipped a vodka cocktail, chatted with Eva Longoria and danced to Michael Jackson’s “Thriller.” Around 1 a.m., Schaech, who arrived separately, made his way over to her table, a witness told Us — and proceeded to lock lips with his ex!

“They were laughing and hanging out,” said the witness, “and then they were kissing!”

The two spent at least 10 minutes together, and even walked around the club holding hands.

Said the partygoer, “It was clearly just a comfortable thing for them.”

No word whether they will reunite for Thanksgiving the year.

Schaech said he will be spending the holiday in Maryland with family.

“I will just be with my family and eat turkey,” he said. “You don’t want me to cook. The turkey is the dad’s job.”

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