A blooper from the hit 90s sitcom shows Allen lifting up his kilt in front of his on-screen wife Patricia Richardson who appears to laugh off the incident.
The video casts doubt on Allen’s statement that he would ‘never do such a thing’ when accused by Anderson of also flashing her on the Home Improvement set.
Unearthed blooper shows the moment Tim Allen appears to flash his co-star Patricia Richardson on the set of 90s sitcom Home Improvement
However Richardson has insisted her co-star was ‘well dressed’ underneath the kilt in the uncovered footage and was wearing a pair of boxer shorts.
The clip begins by showing Allen standing proudly in the kilt, while Richardson’s character Jill Taylor jokes ‘hangs long, I just wish it was shorter.’
Seconds later, Allen turns to lift the kilt completely so only Richardson can see what’s before.
She gasps dramatically as the live studio audience roars with laughter.
But Richardson told TMZ: ‘People ask me what was under the kilt when he flashed me, he was well dressed under there, I was just shocked that he lifted the kilt, not by a man in boxer shorts.’
Richardson laughs off the incident in the clip, later insisting her co-star was wearing boxers
Allen, left, has denied allegations he flashed Anderson, center, on the Home Improvement set
It comes after Anderson sensationally claimed Allen flashed his genitals to her on the same Home Improvement set.
The incident allegedly happened in 1991 when the Baywatch star was just 23 and playing the role of Lisa in the show, which centered around Allen’s character and his family in suburban Detroit. Allen was 37 at the time.
In an extract from her new memoir ‘Love, Pamela’, Anderson, now 55, writes: ‘On the first day of filming, I walked out of my dressing room, and Tim was in the hallway in his robe.
‘He opened his robe and flashed me quickly – completely naked underneath.’
Anderson had previously posed for Playboy magazine at the time of the incident – which Allen used against her.
Anderson, right, appeared with Allen, left, on the ABC show for 22 episodes in 1991 and 1992
She wrote: ‘He said it was only fair, because he had seen me naked. Now we’re even. I laughed uncomfortably.’
But Allen, now 69, has denied the claims, telling Variety Sunday it ‘never happened’.
He added: ‘I would never do such a thing’.
Prior to breaking out as a mainstream star in the 90s, Anderson had appeared on sitcoms such as Married… with Children, Charles in Charge and Top of the Heap.
She appeared on a total of 22 episodes of Home Improvement in its first and second seasons between 1991 and 1992.
Anderson makes the astonishing revelations in her forthcoming memoir ‘Love, Pamela’
She made one last appearance during the show’s sixth season in 1997.
Anderson’s forthcoming memoir, which is published by HarperCollins, also discusses her thoughts on the 2022 Hulu series Pam and Tommy, which centered her sex tape scandal with ex-husband Tommy Lee.
The series, starring Lily James and Sebastian Stan, has been mired in controversy as critics claim it should not have been produced without Anderson’s consent.
In her book, the star says it gave her ‘nightmares’, revealing she still has ‘no desire to watch it’.
The blonde bombshell and Motley Crue drummer had initially tied the knot in 1995, even though the two had only known each other for a total of four days.
She wrote in the book: ‘We just wanted to have babies and be together forever.
She added: ‘My relationship with Tommy may have been the only time I was ever truly in love.’
Together, the former couple welcomed two sons, Brandon, 26, and Dylan, 25.
Their ‘home videos’ were famously stolen from a safe located in Pamela and Tommy’s garage during their marriage, and put together to create the infamous ‘sex tape,’ that caused a media frenzy.
Dailymail.com has reached out to Allen’s representatives for comment.