Will Smith’s rep is slamming a rumor that the “Fresh Prince of Bel-Air” alum had sex with fellow actor Duane Martin in a dressing room years ago.

“This story is completely fabricated and the claim is unequivocally false,” a rep for Smith, 55, told TMZ on Tuesday.

Martin, 58, appeared in the Smith-led ’90s sitcom “Fresh Prince of Bel-Air” in the role of Dr. Martin for one episode, and then playing one of Smith’s poker friends in Season 4.

The Post reached out to both Smith and Martin for comment.

Rumors of the alleged affair first emerged on Monday after Smith’s alleged former assistant, Brother Bilaal, claimed he caught the pair engaging in anal sex in Martin’s dressing room.

“I opened the door to Duane’s dressing room and that’s when I see Duane having anal sex with Will,” Bilaal claimed while appearing on “Unwine With Tasha K.”

Bilaal continued to graphically describe the scene, referring to the “Emancipation” star’s penis as a “pinky toe.”

| Kevin Winter/Getty Images: A rep for Will Smith has denied the “unequivocally” false rumor that Smith and his “Fresh Prince” co-star Duane Martin (left) engaged in sex

A source close to Smith told TMZ that the “Bad Boys” star is thinking of pursuing legal action against Bilaal.

Bilaal’s inflammatory remarks come weeks after Smith’s wife, Jada Pinkett Smith, denied that she and Smith are gay during a primetime special with Hoda Kotb on Oct. 13.

The pair’s marriage has been the subject of many rumors through the years, including whether they’re in an open marriage, are swingers, or one of them is gay.

“I would say that none of that’s true,” Pinkett Smith told Kotb at the time while promoting her memoir “Worthy.”

| Unwine with Tasha K/Youtube: “I opened the door to Duane’s dressing room and that’s when I see Duane having anal sex with Will,” Bilaal. (pictured) claimed. “There was a couch and Will was bent over the couch and Duane was standing up killing him, murdering him. It was murder in there.”

She added: “I definitely can understand why there would be misunderstandings, but none of it’s true.”

Jada also revealed to People that she and her “I Am Legend” husband have been living apart since 2016.

“I think by the time we got to 2016, we were just exhausted with trying,” the actress told Kotb. “I think we were both kind of just still stuck in our fantasy of what we thought the other person should be.”

“I made a promise that there will never be a reason for us to get a divorce. We will work through whatever,” the former “Red Table Talk” host continued. “And I just haven’t been able to break that promise.”

The “Matrix Revolutions” star, 52, added that she and Smith had “been doing some really heavy-duty work together.”

“We just got deep love for each other, and we are going to figure out what that looks like for us,” she explained to People.

| P. Lehman/Future Publishing via Getty Images: Bilaal’s inflammatory remarks come a month after Smith’s wife, Jada Pinkett Smith, revealed to People that she and her “I Am Legend” hubby have been living apart since 2016

A source close to Smith’s kids, Trey, 31, Jaden, 25, and Willow, 23, told “Entertainment Tonight” that they felt “bad” for their dad following the revelations.

“They know he has been going through a lot lately and this isn’t helping,” the source told ET. “They wish some of their family’s private matters remained private.”

“He’s trying not to let any outside noise impact him,” continued the source. “Will loves Jada and feels like he has always had her back and always will. He has been trying to be supportive, while also taking care of himself.”

Despite making headlines, Smith would go on to support Jada at her Baltimore book tour stop on Oct. 18.

He made a speech at the event, according to the Baltimore Sun, saying that he wanted to come “and hold it down for you the way you have held it down for me.”

“As I stand here before you today, I am happier than I’ve ever been in my entire life,” he continued at the time, admitting their relationship has been “brutal and beautiful at the same time” over the years. “I have achieved every single thing I have ever wanted in my entire life. There is not one thing left that I desire in this world — all of the awards, all of the money, the family — everything I’ve ever dreamed.”