Moore returned to Fox screens on The Kelly File six years after his appearance to discuss his 2009 documentary Capitalism: A Love Story. This time, Moore seemed more enthusiastic about his host, even declaring: "God bless you Megyn Kelly!"
His appearance came just after Trump dropped out of the Iowa Republican debate, reportedly after Fox refused to bow to his demands that Kelly be removed as a moderator.
The left-wing film-maker and Fox News’ most high-profile conservative host were agreeable on camera, with Moore clearly impressed by the considerable sway Kelly appears to have within the network.
Moore was on the show to discuss his new documentary Where to Invade Next, but was more determined to highlight that Kelly was the real story of the day, telling the presenter:
“I feel bad for you. You’re being attacked this way. What’s he afraid of? I’m sitting here, I don’t feel any fear. Donald, come sit beside me, I’ll hold your hand- she’s fine!”
As Kelly repeatedly tried to change the subject, he continued: “You just didn’t deserve to be treated this way. You have done something that Jeb Bush, Chris Christie, Rubio, Cruz, none of them have been able to do, which is to essentially frighten him. Everybody’s tried to do this for months and you did it!”
After making a number of jokes about having dinner with Kelly, Moore continued to praise her on his Twitter feed by thanking her for letting Fox viewers “see who I really am”.
Thank u Megyn for letting Fox viewers see who I am, not the fictional version of me invented by other shows. https://t.co/ymBlYJh4Tw— Michael Moore (@MMFlint) January 27, 2016
Trump was heavily criticised for the derogatory comments he made about Kelly after she challenged him about his attitude towards women in the first Republican debate. In a press conference before announcing his boycott, Trump criticised Kelly as a “lightweight” and a “third-rate reporter”.
Kelly is a popular figure among Fox viewers and her programme The Kelly File is the second most-watched show on the network.
Donald Trump's most controversial quotes
Donald Trump's most controversial quotes
1/14 On Isis:
"Some of the candidates, they went in and didn’t know the air conditioner didn’t work and sweated like dogs, and they didn’t know the room was too big because they didn’t have anybody there. How are they going to beat ISIS?"
2/14 On immigration:
"I will build a great wall — and nobody builds walls better than me, believe me —and I’ll build them very inexpensively. I will build a great, great wall on our southern border, and I will make Mexico pay for that wall. Mark my words."
3/14 On Free Trade:
"Free trade is terrible. Free trade can be wonderful if you have smart people. But we have stupid people."
PAUL J. RICHARDS | AFP | Getty Images
4/14 On Mexicans:
"When Mexico sends its people, they’re not sending their best. They’re sending people that have lots of problems. They’re bringing drugs. They’re bringing crime. They’re rapists."
5/14 On China:
"I just sold an apartment for $15 million to somebody from China. Am I supposed to dislike them?... I love China. The biggest bank in the world is from China. You know where their United States headquarters is located? In this building, in Trump Tower."
6/14 On work:
"If you're interested in 'balancing' work and pleasure, stop trying to balance them. Instead make your work more pleasurable."
7/14 On success:
"What separates the winners from the losers is how a person reacts to each new twist of fate."
8/14 On life:
"Everything in life is luck."
9/14 On ambition:
"You have to think anyway, so why not think big?"
10/14 On his opponents:
"Bush is totally in favour of Common Core. I don't see how he can possibly get the nomination. He's weak on immigration. He's in favour of Common Core. How the hell can you vote for this guy? You just can't do it."
11/14 On Obamacare:
"You have to be hit by a tractor, literally, a tractor, to use it, because the deductibles are so high. It's virtually useless. And remember the $5 billion web site?... I have so many web sites, I have them all over the place. I hire people, they do a web site. It costs me $3."
12/14 On Barack Obama:
"Obama is going to be out playing golf. He might be on one of my courses. I would invite him. I have the best courses in the world. I have one right next to the White House."
13/14 On himself:
"Love him or hate him, Trump is a man who is certain about what he wants and sets out to get it, no holds barred. Women find his power almost as much of a turn-on as his money."
14/14 On America:
"The American Dream is dead. But if I get elected president I will bring it back bigger and better and stronger than ever before and we will make America great again."
Trump's campaign released a typically hyperbolic statement announcing his boycott overnight. “Unlike the very stupid, highly incompetent people running our country, Mr Trump knows when to walk away,” the statement said. “Fox News think they can toy with him, but Mr Trump doesn’t play games.”
Fox responded with a defiant reposte accusing Trump of “viciously attacking” Kelly in August. “Capitulating to politicians’ ultimatums about a debate moderator violates all journalistic standards, as do threats, including the one levelled by Trump’s campaign manager Corey Lewandowski toward Megyn Kelly," the statement added.