Amanda Holden Rocks Bob and Red Mini Dress!

debuted a sleek bob as she made a glamorous appearance during 's live semi-final on Saturday. 

The TV personality, 55, looked sensational as she embraced the striking new look after chopping off her long flowing locks. 

Amanda put on a very leggy display in a skimpy red mini dress as she joined fellow judges Simon Cowell, 66, , 47, and , 32. 

The dress boasted a daringly plunging neckline and was cinched at her waist with a striking gold belt which she mirrored in her statement earrings. 

Ahead of the show Amanda took to Instagram with a fun clip as mimicked Miranda Priestly () in The Devil Wears Prada, with music mogul Simon serving as her assistant, played in the movie by .  

Looking nothing short of incredible in the back of her car, she looked up and down at his trademark black outfit with disgust as she recreated the iconic scene, saying: 'Emily, that's all'.

It comes after Amanda sizzled in a daring backless gown as she guzzled champagne on a boozy night out with at the TV bash in London on Wednesday.

She commanded attention in a dramatic, sheer black evening gown with a sultry, high-fashion edge while posing up a storm.

The dress featured a halterneck neckline with a plunging v-front, with black lace detailing below the bodice of the dress.

Amanda looked like she was having the time of her life with Alan, 49, as they posed for animated snaps together while enjoying the drinks.

icon Alan wore a grey suit for the evening. 

The pair are nominated for Best Entertainment Performance for their show Amanda & Alan's Spanish Job and were no doubt celebrating the good news at the party.

Adolescence has dominated the Television Awards shortlist - receiving a mammoth eleven nominations including Limited Drama and Leading Actor, including the Craft Awards. 

Stars Stephen Graham, Owen Cooper, Ashley Walters, Erin Doherty and Christine Tremarco all up for awards. 

The series, which was created by actor Stephen, 52, and writer Jack Thorne, tells the story of British teenager Jamie Miller, who is found guilty of murdering a female classmate after being sucked in by the manosphere online. 

Stephen will compete against Lockerbie's , The Death of Bunny Monro's and Smoke's in the Leading Actor category. 

While Ashley, 43, will face his co-star Owen, 16, in the Supporting Actor category, alongside Mobland's Paddy Considine, The Death of Bunny Munro's Rafael Mathe, The Gold's Joshua McGuire and Down Cemetery Road's Fehinti Balogun.

While Erin, 33, will be up against The White Lotus's Aimee Lou Wood, co-star Christine, Get Millie Black's Chyna McQueen, Task's Emilia Jones and Rose Ayling-Ellis in Reunion as Leading Actress, the first time she has been nominated in the category.

Stephen could also be up for a win in his performance of Disney+ series A Thousand Blows, created by Steven Knight, which is up for seven awards including Drama Series with Disney+ up for 16 awards in total.