Simon Cowell taunts fellow BGT judge Amanda Holden over her ill-fated marriage to 'dinosaur' ex Les Dennis

He is playfully known as Mr Nasty.

So it's no surprise that Simon Cowell lived-up to his reputation during the latest round of Britain's Got Talent auditions, recently, where he took aim at co-judge Amanda Holden.

The music mogul, 56, got personal with the 44 year-old when he poked fun at her ill-fated marriage to Les Dennis in a hilarious barbed comment.   

Scroll down for video 

Simon Cowell lived-up to his 'Mr Nasty' reputation during the latest round of Britain's Got Talent auditions, where he took aim at co-judge Amanda Holden's ill-fated marriage to Les Dennis
Simon Cowell lived-up to his 'Mr Nasty' reputation during the latest round of Britain's Got Talent auditions, where he took aim at co-judge Amanda Holden's ill-fated marriage to Les Dennis

Close to the bone? Simon Cowell lived-up to his 'Mr Nasty' reputation during the latest round of Britain's Got Talent auditions, where he took aim at co-judge Amanda Holden's ill-fated marriage to Les Dennis

According to the Daily Star, the incident happened when a troupe of dancers took to the stage in a T-Rex themed performance. 

Amanda responded with: 'I can see the dinosaur winking at me, it’s flirting with me. It’s not the first time I’ve been flirted with by someone prehistoric.'

To which Simon responded: 'Leave Les [Dennis] alone'. 

See more of the latest on Simon Cowell as he taunts Amanda Holden over her 'dinosaur' ex

Cheeky chappy: Music mogul Simon implied that Les was a dinosuar for being 18 years older than Amanda

Cheeky chappy: Music mogul Simon implied that Les was a dinosuar for being 18 years older than Amanda

Ill-fated: Amanda and Les married in 1996 - but the union ended five years later when she had an affair with Men Behaving Badly star Neil Morrissey

Ill-fated: Amanda and Les married in 1996 - but the union ended five years later when she had an affair with Men Behaving Badly star Neil Morrissey

Unimpressed by the jibe, an embarrassed Amanda then threatened to throw cold water over him in revenge.

But this isn’t the first time Simon - who's hit acts over the years include Sonia, Alexandra Burke and Sinitta - has poked fun at his co-star and her Family Fortunes ex.

A few years earlier he implied that Amanda's career was launched on the back of Les' already-established profile. 

Critiquing one act, Amanda said: 'Look at me. I went from rags to riches,', to which Simon quipped : 'You went from Les Dennis!'.

She can give it, but she can't take it! Unimpressed by the jibe, an embarrassed Amanda then threatened to throw cold water over Simon 

She can give it, but she can't take it! Unimpressed by the jibe, an embarrassed Amanda then threatened to throw cold water over Simon 

Back in the day: Amanda and Les pictured together at the BAFTA Awards in 1998

Back in the day: Amanda and Les pictured together at the BAFTA Awards in 1998

TV insiders on BGT claim ambitious Amanda broke down in tears afterwards, arguing that the light-hearted dig was 'close to the bone.'

Amanda was a relative-unknown when she met, and later married, Les in 1995 - when she was just 24 and he was 18 years her senior, at 42.

The union collapsed five years when she indulged in an affair with Men Behaving Badly actor Neil Morrissey, which was later made public.

Over-reaction: TV insiders on BGT claim ambitious Amanda broke down in tears afterwards, arguing that the light-hearted dig was 'close to the bone'

Over-reaction: TV insiders on BGT claim ambitious Amanda broke down in tears afterwards, arguing that the light-hearted dig was 'close to the bone'

Humble beginnings: Amanda was a relative-unknown when she met, and later married, Les in 1995 - when she was just 24 and he was 18 years her senior, at 42

Humble beginnings: Amanda was a relative-unknown when she met, and later married, Les in 1995 - when she was just 24 and he was 18 years her senior, at 42

Amanda is now in a relationship with Chris Hughes - although that too has also had eyebrow-raising moments. 

In 2013 she revealed how she tricked him into having a baby. 'Chris wanted to wait but I had other ideas,' she said. 'In fact Chris thought I was on the pill but in reality I spat them away on a daily basis.

'I can only put it down to the primal need to have another baby and that had overtaken me.'

The comments below have been moderated in advance.

The views expressed in the contents above are those of our users and do not necessarily reflect the views of MailOnline.

By posting your comment you agree to our house rules.

Who is this week's top commenter? Find out now