The former One Tree Hill star, 35, made the claim on Twitter, hours after Affleck had condemned Hollywood producer Harvey Weinstein over the sexual harassment allegations made against him.
One Twitter user said Affleck should have “kept quiet”, prompting another to tweet: “He also grabbed Hilarie Burton’s breasts on TRL once. Everyone forgot though.”
Burton, who co-hosted the show, replied: “I didn’t forget.”
I didn't forget.— Hilarie Burton (@HilarieBurton) October 10, 2017
She then thanked the Twitter user and admitted to laughing at the alleged incident in a bid to stop herself from crying at the time.
Alongside a clip from the show she praised those who have come forward to expose Weinstein, tweeting: “Girls. I'm so impressed with you brave ones. I had to laugh back then so I wouldn't cry. Sending love.”
Seriously, thank you for that. I was a kid.— Hilarie Burton (@HilarieBurton) October 11, 2017
https://t.co/wh2MpJVQzl— Hilarie Burton (@HilarieBurton) October 11, 2017
Girls. I'm so impressed with you brave ones. I had to laugh back then so I wouldn't cry. Sending love.
Burton’s tweets came hours after Affleck said he had been left “saddened and angry” by the accusations levelled against Weinstein.
In a statement he deemed Weinstein’s behaviour “completely unacceptable” and said more efforts need to be taken for “protecting our sisters, friends, co-workers and daughters”.
Actress Rose McGowan, who is among the women accusing Weinstein, slammed Affleck’s statement, branding him a “liar”.
She tweeted: “@benaffleck ‘GODD*MNIT! I TOLD HIM TO STOP DOING THAT’ you said that to my face. The press conf I was made to go to after assault. You lie.”
@benaffleck “GODDAMNIT! I TOLD HIM TO STOP DOING THAT” you said that to my face. The press conf I was made to go to after assault. You lie.— rose mcgowan (@rosemcgowan) October 10, 2017
Scores of actresses have come forward accusing Weinstein of sexual harassment, assault and rape including Rosanna Arquette, Judith Godrèche, Asia Argento and A-listers Angelina Jolie and Gwyneth Paltrow.
Paltrow claimed Weinstein placed his hands on her and suggested that they go to the bedroom for “massages”, which she refused to do, during a meeting at the Peninsula Beverly Hills hotel after she’d been given the lead role in Emma at the age of 22.
Jolie said that Weinstein also made unwanted advances towards her during the release of her 90s film, Playing by Heart.
Weinstein – who has flown to Europe for sex therapy after being sacked from his production company – has unequivocally denied the accusations.
His wife Georgina Chapman today revealed she is leaving her husband of 10 years over his “unforgivable actions”.
In a statement the British fashion designer said: “My heart breaks for all the women who have suffered tremendous pain because of these unforgivable actions.
“I have chosen to leave my husband. Caring for my young children is my first priority and I ask the media for privacy at this time.”
Stars including Dame Judi Dench, Meryl Streep, Lena Dunham, George Clooney and Leonardo DiCaprio have all publicly condemned Weinstein.
But actress Lindsay Lohan appeared to defend the Oscar winning producer, saying the accusations need to stop.
In an Instagram video, which has since been deleted, she said she “feels bad” for Weinstein, who she claimed has never acted inappropriately towards her, and encouraged his wife Georgina Chapman to support him.
Standard Online has contacted a representative for Affleck for comment.