- The 46-year-old star is appearing in a star-studded production of Richard Harris' 1985 play Stepping Out
- Britain's Got Talent judge is taking the stage at London's Vaudeville Theatre for a four-month run
- The show, also starring Angela Griffin and Tracy-Ann Oberman, toured Bath, Cambridge and Chichester
- Tamzin Outhwaite was forced to withdraw from the London show after breaking her ankle last week
A triumphant show was rewarded with an equally rousing after-party as Amanda Holden celebrated the West End launch of her new play on Tuesday evening.
But the actress suffered a wardrobe malfunction at the end of the night, when she inadvertently flashed a nipple while making her exit from London's Coutts Bank, following a press night showing of Richard Curtis’s stage comedy Stepping Out.
The top of her plunging white trouser suit gave way to expose a little more of her bosom than she'd intended as she climbed into a waiting cab to make her way home.
Just nipping out! Amanda Holden suffered an embarrassing wardrobe malfunction while exiting an after-party for the West End launch of new play Stepping Out on Tuesday evening
And she appeared to be aware that that something was amiss while leaving the venue with her 11-year-old daughter Alexa, as she covered one of her breasts with her hand.
But she soon had to let go of her top once she boarded the waiting vehicle - unintentionally exposing herself in the process.
Earlier in the evening, things were a lot more composed for the TV personality, when she turned heads while arriving in the daring ensemble.
Something amiss: As she left the bash with her 11-year-old daughter Alexa, she appeared to be aware that her top was on the verge of letting her down, as she covered her breast
Oops! But her top eventually let her down when she removed her hand to board a waiting taxi
Daring choice: Even without the malfunction, the Britain's Got Talent judge's choice to go braless under her top proved to be a decidedly daring choice
Out in style: She held hands with her adorable daughter, who looked stylish in a red dress
Centre of attention: The TV star glowed as all eyes were on her over the course of the night
Great body of work: The 46-year-old's ensemble flattered her enviably svelte physique
With a tapered jacket fully exposing her cleavage and cropped, high-slung and heavily pleated trousers rounding things off, the actress ensured she commanded attention.
Gold stiletto heels gave her ensemble a distinctive flourish, while a liberal layer of deep red lipstick offered an additional splash of colour.
Styling her dyed hair with a simple centre parting, Amanda beamed while posing for photos shortly after arriving alongside co-stars Tracy Ann-Oberman, Anna-Jane Casey and Nicola Stephenson.
Special guests: (L-R) Tamzin Outhwaite and Nicole Appleton were also among the party guests
Brace yourself: Tamzin sported a cumbersome leg brace under her midnight blue gown
Injury: She revealed to Good Morning Britain earlier this month that she sustained the injury while dancing
Scan: She also said that she was going to have a CT scan to check for any possible hairline fractures
Celebration: Despite her injury, she was in jovial spirits as she left the celebratory gathering
Perks of the job: TV presenter Ben Shepherd was at the party with his wife Annie Perks
True blue: Clare Balding added a pop of colour to her black ensemble with an electric blue top
The actress enjoyed something of a Britain's Got Talent reunion on the night courtesy of fellow judging panellist Alesha Dixon, 38, who was on hand to support her friend alongside show hosts Ant McPartlin and Declan Donnelly.
Opting for a smart white blazer over a simple black vest top and ripped jeans, the former Mis-Teeq star was in typically high spirits as she made her way inside.
Elsewhere Stepping Out cast-member Tamzin Outhwaite was forced to watch from the sidelines after being ruled out of the West End launch with a damaged foot.
Leading lady: The star's show got a rousing reception on the glittering press night
In good company: The actress was joined by a host of cast members, among them Anna-Jane Casey (L) and Tamzin Outhwaite (R)
Looking good: Sporting a tasteful cream trouser suit, Amanda, 46, looked typically stylish while celebrating with her cast-mates ahead of what promises to be a successful three-month run
Revealing: With a tapered jacket fully exposing her cleavage the actress ensured she commanded attention
Old friends: Amanda offered co-star Tamzin Outhwaite a hug following Tuesday evening's press night
Not involved: Tamzin has been forced to temporarily pull out of the West End show after damaging her foot
Painful: The actress revealed her leg brace while rubbing shoulders with fellow guest Nicole Appleton
Recovering: Tamzin has had to pull out of West End show, Stepping Out, while she recovers from her injury, believed to have been sustained during energetic dance rehearsals
Say cheese: Leading lady Amanda was later joined by male co-star Dominic Rowan
Walking with the aid of a crutch, the actress, 46, revealed a large leg brace beneath her sweeping black evening gown as she chatted with fellow guest Nicole Appleton.
Speaking to Good Morning Britain about her injury in March, she said: : 'I'm having another CT scan today to find out if there is any hairline fractures in there.
'I really did just think it was going to be an infection. I was in a lot of pain... we were all dancing and having a brilliant time, I did a run through in front of the producers and half way through I was in a lot of pain.
'It kept swelling up and then I couldn't get through the run-through.I just said that, and was almost crying in pain.'
Anna-Jane Casey will fill in for Tamzin until she is able to rejoin the production.
Incoming: The actress enjoyed something of a Britain's Got Talent reunion on the night courtesy of fellow judging panelist Alesha Dixon, 38, who was on hand to support her friend
Sophisticated: Opting for a smart white blazer over a simple black vest top and ripped jeans, the former Mis-Teeq star was in typically high spirits as she made her way inside
Popular pair: Britain's Got Talent hosts Ant McPartlin and Declan Donnelly were also in attendance
Other guests to attend the press launch included Girls Aloud star Kimberley Walsh, who opted for a sophisticated trouser suit.
Elsewhere Miranda Hart sported a comparatively casual black blouse and jeans teamed with simple black slip-on trainers.
Meanwhile Good Morning Britain presenter Ben Shephard arrived with his with his wife of 13-years, Annie Perks.
Others to watch Amanda take to the stage as leading lady Vera included Lesley Joseph, Julia Bradbury, Clare Balding and Maria Friedman.
Hugs: Amanda Holden, Tracy-Ann Oberman, Nicola Stephenson and Tamzin Outhwaite gathered for a group embrace
Making an entrance: Kimberley Walsh (L) and Miranda Hart (R) were also in attendance on Tuesday evening
Pals: Tracy-Ann Oberman got a playful kiss form Tamzin Outhwaite at the after-party
Night out: Julia Bradbury (L) and Birds of a Feather star Lesley Joseph were among guests at the official launch
Date night: Meanwhile Good Morning Britain presenter Ben Shephard arrived with his with his wife of 13-years, Annie Perks
In you go: Clare Balding (L) and Maria Friedman (R) made their presence felt outside London's Vaudeville Theatre
Centre stage: Amanda Holden plays Vera in the hit play, while Anna-Jane Casey - a stand in for the injured Tamzin - plays Mavis
Long running: The award-winning comedy was written by Richard Harris and debuted in the West End in 1984 where it remained until a move to Broadway in 1987
The award-winning comedy was written by Richard Harris and debuted in the West End in 1984 where it remained until a move to Broadway in 1987.
There have been a number of touring productions in the UK since as well as a star-studded film adaptation in 1991.
The current production will run in the West End until June 17.
All together now: (L to R) Cast members Jessica Alice McCluskey, Lesley Vickerage, Sandra Marvin, Natalie Casey, Anna-Jane Casey, Amanda Holden, Tamzin Outhwaite, Tracy-Ann Oberman, Judith Barker and Nicola Stephenson