Inside Keith Lemon’s birthday bash

Keith Lemon enjoyed a star-studded dress-up party in honor of his 50th birthday on Saturday night with a host of his famous friends spending the night drinking and dancing.

The comedian invited the likes of Emily Atack, Myleene Klass, Holly Willoughby and Laura Whitmore to the London event, where everyone really put in some effort with their costumes.

Emily, 33, put on a glamorous display as she dressed the late Marilyn Monroe in a white off-the-shoulder dress with a thigh-high slit and a matching shawl draped over her shoulders.

She shared snaps from inside the party as she posed with the year-old and her former Celebrity Juice co-star Laura, 37, and husband Iain Stirling.

They looked like they were all having a great time as they hit the dance floor and sipped champagne.

Outfits: Myleene Klass and her husband Simon Motson dressed as Mozart and Salieri, with Simon dressed as a piano

Crew: The comedian invited the likes of Emily Atack, Myleene Klass, Holly Willoughby and Laura Whitmore to the London event, where everyone really put in some effort with their costumes

Elsewhere, Myleene Klass and her husband Simon Motson dressed up as Mozart and Salieri, while Simon dressed up as a piano.

Myleene, 45, looked like she was making the most of the party as she broke down some moves and shared the clips on her Instagram story.

Laura also gave a glimpse of the lavish venue decorated with huge luminous 50 signs and the birthday cakes made for Keith.

Elsewhere Hulst, 42, was seen in a hot pink flared jumpsuit with stars on the lapel and legs in the style of Barbie from the upcoming movie starring Margaret Robbie.

She was joined by her This Morning co-host Phillip Schofield, 61, who dressed as Ron Burgundy from the Anchorman films.

Also in attendance was Emma Bunton, 47, who stepped out with husband Jade Jones, 44.

Spice Girl Emma looked sensational as she put on a leggy display in a white shirt dress.

Baby Spice added a few inches to her stature by wearing a pair of beige platform shoes and carrying a handbag in the shape of a seashell.

She wore her long blonde hair in waves while dressing up as the character Madison from the 1984 movie Splash.

Fun: She shared snaps from inside the party as she posed with the year-old and her former Celebrity Juice co-star Laura, 37, and husband Iain Stirling

Fun: Laura also gave a glimpse of the lavish venue decorated with huge light-up 50 signs and the birthday cakes made for Keith

Laughter: They looked like they were all having a great time as they hit the dance floor sipping champagne (Keith played Myleene’s piano)

Effort: Laura praises Myleene and Simon for their effort as they came to the party in their musical costumes

Drinks! Laura had a drunken night out drinking champagne all night in London

Incredibly, the other partygoers were seriously impressed by Myleene and Simon’s efforts that night

Played by actress Daryl Hannah, the film follows the story of a young man who falls in love with a mysterious woman who is secretly a mermaid.

Pop star Emma seemed in high spirits as she arrived with former boy band star Jade as the pair walked arm in arm.

Elsewhere, Fearne Cotton, 41, who was also a Celebrity Juice regular, wore a bright yellow top and brown plaid skirt when she arrived.

She put on a beret and a scarf and increased her height by wearing a pair of black heels at night.

TV and radio star Fearne was seen alongside her husband Jesse Wood, 46, who looked smart in a gray suit and brown hat.

LOL: People were shocked by Myleene’s incredible costume as she posed with others in attendance

Boozy: Laura was seen letting her hair down at the party dancing and snapping some moves into clips

Having a great time: Myleene shared some videos dancing on the dance floor with the birthday boy

Crew: The stars of Celebrity Juice reunited at the star-studded party in London on Saturday night

Wow: Emily put on a glamorous display as she dressed the late Marilyn Monroe in a white off-the-shoulder dress

Getting ready: Laura and Iain put on their fancy dress clothes and got ready to leave for the party earlier in the evening

Hitting the dance floor: Myleene also shared snaps of Keith and Iain letting loose on the dance floor

Playing the role: Holly took to her Instagram Stories to share a photo of herself in her costume wishing Leigh a happy 50th for his birthday on Sunday

Acting: Phillip Schofield posed in his suit while dressing up as broadcaster Ron Burgundy from the Anchorman films

Family affair: Phillip and his wife Stephanie (left) were joined by their daughters Molly, 30, and Ruby, 27, and the pair both dressed up as secret agents

Double trouble: Phillip posed with fellow TV presenter Joel Dommett (left) wearing the same costume the same night

Many of the stars took to their Instagram pages to share photos of themselves in their costumes or from the inside at the party.

Emily posed with her arm around Leigh, also known as Keith Lemon, with the funny man dressed as Star Wars character R2-D2.

Keith took to Instagram for his birthday to joke about his age, joking that he was as old as some retro items.

He wrote: ‘Birthday tomorrow! I’m as old as #Atari, #theexcorcist #mcdonaldsmcmuffin #pharrellwilliams #tyrabanks #nevecampbell #davechappelle #swampthing.