Rachel Johnson looks chic in a leopard print shirt dress and she joins rocker Bob Geldof at Nicky Haslam's star-studded 80th birthday party

Rachel Johnson and Bob Geldof led the stars at interior designer and socialite Nicky Haslam's 80th birthday party in London on Thursday.

The journalist, 54, looked elegant in a shimmering leopard print shirt dress paired with a chic black belt as she attended the festitivities at the Polish Hearth club.

The sister of Prime Minister Boris Johnson, who looked radiant as she smiled for the cameras, was seen posing up with former Celebrity Big Brother star Cleo Rocos, 57.

Chic: Rachel Johnson and Bob Geldof led the stars at interior designer and socialite Nicky Haslam's 80th birthday party in London on Thursday

Chic: Rachel Johnson and Bob Geldof led the stars at interior designer and socialite Nicky Haslam's 80th birthday party in London on Thursday

Appearance: Boomtown Rats rocker Bob Geldof looked dapper as he made an appearance at the soiree

Appearance: Boomtown Rats rocker Bob Geldof looked dapper as he made an appearance at the soiree

Cleo was stylish in an off-the-shoulder black sequinned gown paired with silver glitterball earrings.

Her curly auburn tresses were worn brushed back from her face while her gorgeous features were enhanced with fluttery lashes and coral lipstick.

Boomtown Rats rocker Bob, 68, looked dapper in a black tee and a matching, sharply tailored suit as he attended the party.

Party: The sister of Prime Minister Boris Johnson, who looked radiant as she smiled for the cameras, was seen posing up with former Celebrity Big Brother star Cleo Rocos, 57

Party: The sister of Prime Minister Boris Johnson, who looked radiant as she smiled for the cameras, was seen posing up with former Celebrity Big Brother star Cleo Rocos, 57

Birthday boy: Nicky looked delighted as he posed in a silver suit and navy tie and posed with a guest

Birthday boy: Nicky looked delighted as he posed in a silver suit and navy tie and posed with a guest

Rock on: Duran Duran musician Nick Rhodes joined Cleo for a glamorous snap

Rock on: Duran Duran musician Nick Rhodes joined Cleo for a glamorous snap 

Dapper: Actor Rupert Everett looked delighted as he posed with Turkish fashion designer Rifat Ozbek

Dapper: Actor Rupert Everett looked delighted as he posed with Turkish fashion designer Rifat Ozbek

Outing: Bob was joined by glamorous wife Jeanne Marine and British jewellery designer Theo Fennell

Outing: Bob was joined by glamorous wife Jeanne Marine and British jewellery designer Theo Fennell

Hollywood actor Rupert Everett, 60, was also in attendance, with the star cutting a debonair figure in a black suit, navy jumper and pinstriped shirt. 

Back in October, Rachel admitted that being the Prime Minister's sister meant 'a world of pain' in her appearance on the BBC's Have I Got News For You.

The avid Remainer, who has been critical of the UK's decision to leave the EU, quickly objected to being introduced as the sibling to Boris Johnson.

Ms Johnson said on the BBC show: 'I like the way you introduce me as Boris Johnson's sister as if that is actually my day job.'

She joked with panelists that being the Prime Minister's sister meant a 'world of pain'.  

Smitten: Downton Abbey creator Julian Fellowes attended with his gorgeous wife Emma

Smitten: Downton Abbey creator Julian Fellowes attended with his gorgeous wife Emma 

Newlyweds: Lady Gabriella Kingston posed up with financier husband Thomas

Newlyweds: Lady Gabriella Kingston posed up with financier husband Thomas

Host Victoria Coren Mitchell later asked Ms Johnson: 'Does Boris ever phone you up and say 'oh don't say that it's really embarrassing.'

The broadcaster and journalist - who appeared on the popular programme with Paul Merton, Ross Noble, and Ian Hislop - quickly retorted: 'Yup'.

She added that after she made the comment about No Deal Brexit only benefiting currency speculators that 'it meant Christmas Chequers was canceled.'

Ross Noble joked she could retort to her brother that 'everything you do is embarassing, goodbye.'

Style: Fashion model Penelope Tree shimmered in a silver sequin embellished blazer

Style: Fashion model Penelope Tree shimmered in a silver sequin embellished blazer 

Banter: My Best Friend's Wedding star Rupert looked dapper in a navy suit and striped shirt

Banter: My Best Friend's Wedding star Rupert looked dapper in a navy suit and striped shirt

Busty: Photographer Amanda Eliasch wowed in a plunging black ensemble

Busty: Photographer Amanda Eliasch wowed in a plunging black ensemble 

She then added 'No, I'm under orders to not do any chat shows, not to say anything about the Prime Minister, this is my safe space' to raucous laughter from the audience.

In a regular feature of the show, part of the show panelists were given a headline to complete that started 'Queen set to earn £100 million from (blank space).'

Ms Johnson said: 'I know, suing the Prime Minister for illegal prorogation.'

Chat: Businesswoman Carole Bamford posed up with the birthday boy at the soiree

Chat: Businesswoman Carole Bamford posed up with the birthday boy at the soiree

Then she puts her hands to her face and exclaims: 'Cut that bit! Christmas at Chequers is cancelled.'

Mr Merton then retorts: 'Well he may not be at Chequers at Christmas, you don't know.'

She quickly responded: 'I hope he is.'

Chat: Businessman Robin Birley was seen chatting with a friend during the party

Chat: Businessman Robin Birley was seen chatting with a friend during the party