Cat Deeley and her ITV co-star Olivia Attwood were among the stars attending a lavish event on Monday to celebrate the broadcaster’s 70th anniversary.

This Morning host Cat, who is newly single following the announcement of her split from husband Patrick Kielty, stunned in a minidress.

Boasting a big smile, the mum of two showed off her long legs in the long-sleeved bright orange piece.

Cat, 48, also posed with her daytime co-presenter Ben Shephard who looked dapper in a navy suit for the bash.

Also snapped on the way into the event, which took place at the historic Guildhall in London, was Olivia Attwood, who has recently joined the This Morning presenting team.

The former Love Island star, 34, wowed in a stunning white oversized blazer over a busty crop top, paired with wide-leg, high-waisted trousers.

Cat Deeley and her ITV co-star Olivia Attwood were among the stars attending a lavish event on Monday to celebrate ITV's 70th anniversary

Cat Deeley and her ITV co-star Olivia Attwood were among the stars attending a lavish event on Monday to celebrate ITV’s 70th anniversary

Olivia wowed in a stunning white oversized blazer over a busty crop top, paired with wide-leg, high-waisted trousers

Olivia wowed in a stunning white oversized blazer over a busty crop top, paired with wide-leg, high-waisted trousers

Boasting a big smile, newly single Cat showed off her long legs in the long-sleeved bright orange piece

Boasting a big smile, newly single Cat showed off her long legs in the long-sleeved bright orange piece

Olivia – who turned heads with her cosy Ibiza snaps with Pete Wicks – was all smiles for the cameras. 

ITV’s birthday bash is taking place at the same location of its very first broadcast, all the way back in 1955. 

Hosted by Joel Dommett, the evening honours seven decades of groundbreaking television moments.

Stars from across some of the channel’s biggest programmes over the years, from current affairs to drama and soaps, are in attendance. 

Good Morning Britain anchor Susanna Reid oozed class as she stayed up past her bedtime for the event.

The journalist posed for pictures wearing a classy black evening gown featuring a daring thigh-high split.

Her co-star Charlotte Hawkins, who recently revealed her wilder side, wore a stunning embroidered blue sheer dress.

Cold Feet’s Fay Ripley was pictured arriving at the event, while Loose Women veteran Gloria Hunniford was also snapped.

wowed in a stunning white oversized blazer over a busty crop top, paired with wide leg and high-waisted trousers

Cat, 48, also posed with her daytime co-presenter Ben Shephard who looked dapper in a navy suit for the bash

Good Morning Britain anchor Susanna Reid oozed class as she stayed up past her bedtime for the event, wearing a classy black evening gown

Good Morning Britain anchor Susanna Reid oozed class as she stayed up past her bedtime for the event, wearing a classy black evening gown

Her co-star Charlotte Hawkins, who recently revealed her wilder side, wore a stunning embroidered blue sheer dress

Kate Garraway stunned as she wore an elegant turquoise frock for the event

Kate Garraway stunned as she wore an elegant turquoise frock for the event

Scottish star Lorraine Kelly posed for snaps before celebrating ITV - ahead of her show being cut to a seasonal slot and just a 30-minute runtime each day

Scottish star Lorraine Kelly posed for snaps before celebrating ITV – ahead of her show being cut to a seasonal slot and just a 30-minute runtime each day 

Kate Garraway stunned as she wore an elegant turquoise for the event

Graham Norton was also in attendance, wearing a velvet grey suit

Former Love Island host Laura Whitmore pictured with her husband Iain Stirling

Former Love Island host Laura Whitmore pictured with her husband Iain Stirling 

Long-standing ITV News anchor Mary Nightingale looked incredible in a white suit

Long-standing ITV News anchor Mary Nightingale looked incredible in a white suit 

Emmerdale actresses Charlotte Bellamy, Zoe Henry, Lisa Riley and Natalie J Robb could also be seen arriving.

Rival soap Coronation Street was also represented by Ben Price, Barbara Knox and Channique Sterling-Brown.

Former Love Island presenter Laura Whitmore stepped out with her husband Iain Stirling, who still narrates the dating show.

Graham Norton was also in attendance, with the Irish star wearing a snazzy grey velvet suit and floral shirt for the night.

Representing The Chase, professional quizzer and I’m A Celebrity star Anne Hegerty showed off her impressive weight loss. 

ITV last celebrated a major milestone at the Guildhall for its 50th anniversary in 2005.

Coronation Street was represented by three of its current biggest stars: Ben Price, Barbara Knox and Channique Sterling-Brown

Coronation Street was represented by three of its current biggest stars: Ben Price, Barbara Knox and Channique Sterling-Brown

Emmerdale actresses Charlotte Bellamy, Zoe Henry, Lisa Riley and Natalie J Robb were also snapped

Emmerdale actresses Charlotte Bellamy, Zoe Henry, Lisa Riley and Natalie J Robb were also snapped

Emmerdale was too with Charlotte Bellamy, Zoe Henry, Lisa Riley and Natalie J Robb (left to right) also snapped

Charlene White dazzled in a chic black off-the-shoulder midi dress

Cold Feet's Fay Ripley was pictured arriving at the event

Cold Feet’s Fay Ripley was pictured arriving at the event

Emmerdale baddie Claire King also attended the special event in London 

Ellie Simmonds looked incredible in a brown jumpsuit that featured a white polka dot pattern

Ellie Simmonds looked incredible in a brown jumpsuit that featured a white polka dot pattern

ITV’s celebrations come just months after it was announced that major cuts would be carried out across its daytime schedule.

In a bid to save cash, both Lorraine and Loose Women will become seasonal programmes, with Lorraine being slashed to just 30 minutes a day.

Both shows, as well as schedule staple This Morning, will also vacate their studio space currently at Television Centre in west London.

The Daily Mail previously revealed the shows will be broadcast from an underground studio at The Hospital Club in London from next year.