Former New Jersey Gov. Chris Christie dished on his infamous hot-mic snafu in which he insisted Nikki Haley would get “smoked” minutes before he bowed out of the 2024 contest last month.

Christie, 61, was speaking to co-anchor George Stephanopoulos on ABC’s “Good Morning America” when he admitted he made a faux pas, but revealed the “funniest part” of the debacle.

“I’ll tell you, George, it was a complete mistake, but the way I found out is actually the funniest part of the story,” Christie said.

Christie was about to announce he was suspending his campaign at a town hall in Windham, New Hampshire, when The Post heard him on a video feed promoted by his campaign grousing about the state of the race.

He was unaware that his parting shot that Haley was “not up to this” was being livestreamed — until he got a phone call.

“I had my phone on vibrate, but the only person whose ringtone bursts through when I have it on vibrate is my son, Andrew. And the phone rang, and I picked it up, and I said, ‘I’m getting ready to go out,’ and he goes, ‘Hot mic! Hot mic! Hot mic!’”

The following day, Christie took a call from Haley, who soared past him in the New Hampshire polls, a state on which he effectively banked his presidential campaign.

“It was a 45-second conversation. She told me, ‘I know it’s personal decisions and inner race. And it’s a tough decision to get out. I heard everything you said last night, including the hot mic.’ And I said, ‘Uh-huh,’” Christie recounted.

They wished one another good luck. Christie contended that he had nothing to apologize for regarding the hot mic, and had no intention of endorsing Haley.

“I made a decision in 2016 — the only time in my political career where I endorsed someone purely for political reasons, even though I had some misgivings. And that’s why I endorsed Donald Trump,” he said.

“It was the biggest mistake I made in my political career. And I’m just not going to repeat that mistake.”

Latest coverage of Nikki Haley’s presidential campaign

Christie has long quibbled with Haley’s willingness to back the eventual Republican Party nominee for the presidency — even if the nod goes to Trump.

Adamant that he won’t vote for Trump “under any circumstances,” Christie explained that he’s not sure whom he will vote for in the New Jersey primary or the general election.

“I probably would just skip that part,” he said of the primary, noting he won’t write in himself.

“I don’t know who the full field is going to be yet. And there might be a No Labels candidate who I might look at,” Christie added about the general election.

He also declined to rule out a bid for the White House on the No Labels ticket, describing this election cycle as a rare time when a third-party contender might be able to make a difference.

“It would be a long conversation with me and [wife] Mary Pat,” he said. “What I’ve said in the past is that I’d have to see a path for anybody, not just me … to 270 electoral votes.”

For Democrats, Christie had simple advice: “Replace Joe Biden.”

“I just think that Joe Biden is probably the only major Democrat who Donald Trump could beat,” he said. “I like President Biden personally, always have, but, you know, past the sell-by date.”

On Tuesday, Christie’s new book “What Would Reagan Do? Life Lessons from the Last Great President” hit bookshelves.

The book reflects on the legacy of former President Ronald Reagan and the state of the Republican Party.

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