Joan Collins, 90, and husband Percy Gibson, 59, enjoy a boozy triple lunch date with Michael Caine and her brother Bill: 'Old friends are the best friends!'

Joan Collins and her husband Percy Gibson enjoyed a triple lunch date with their 'old friend' Michael Caine, his wife Shakira, and her brother and his wife Hazel.

The actress, 90, shared a picture of herself sat beside the veteran actor, 91, as they enjoyed a boozy lunch with red wine at Bucci in Chelsea, London, on Thursday.

Joan and Michael have been pals for decades after mixing in the same showbiz circles, regularly dining out together with their respective partners. 

In the caption, Joan wrote: 'Great to catch up with Michael and his beautiful wife Shakira as well as my brother Bill and sister in law Hazel at our favorite Italian!'

During the outing, Joan looked typically chic in a cream blouse and beige blazer, while she wore her hair in a chic updo and sported a glamorous coat of make-up.

The British star was sat with her arm slung over Shakira, 77, who also looked elegant in a black and white blouse. 

Shakira was positioned next to Joan's sister in law Hazel, who looked lovely in a purple scarf for the outing.

On the other side of the table, Michael sat beside Joan's brother Bill, who was to the right of her husband Percy.

The group appeared in high spirits as they huddled around the linen-covered table and beamed for the snap.

On their table was an empty bottle of red wine and two unfinished desserts, as well as a bottle of water and glasses. 

The boozy lunch comes days after Joan claimed her two-step routine is the key to recovering from a dreaded hangover.

The Dynasty star said she makes sure she drinks tons of water during and after a night out to prevent a sore head in the morning, as well as having a full day in bed.

After decades of partying and socialising, Joan is for sure the one to trust when it comes to knowing a thing or two about hangovers.

Speaking to The Sun, she said: 'How do I cure a hangover? Tons and tons of water and stay in bed as long as possible!

'I only drink socially and I have glasses of water in between — that's my secret.'

Joan recently attended Vanity Fair's annual Oscars party at the Wallis Annenberg Center in Beverly Hills earlier this month.

She showed off her age-defying looks in a draped green sequin gown for the event, with matching emerald jewellery and a clutch.

While Percy put on a sharp display in a black tuxedo and coordinating bow tie as they cosied up on the red carpet.

Percy, who is 31 years Joan's junior, is Joan's fifth husband, with the pair tying the knot at London's Claridge's in February 2002.

The American Horror Story star was previously married to Maxwell Reed, Anthony Newley, Ron Kass and Peter Holm. 

Originally from Peru, Percy is a noted Hollywood producer, known primarily for producing Who Wants to be a Millionaire.

The pair hit it off right away and when a last minute change of plans saved Percy from being near the World Trade Center on 9/11, they decided to marry. 

Gushing about her husband, Joan told Saga magazine: 'He takes care of everything. He takes care of my children and all our finances. He's the love of my life. It's a great marriage, a great relationship.'

Joan, who calls Percy 'the best lover I ever had' in her book Behind The Shoulder Pads, recalled how their relationship was platonic at first.

She explained: 'Percy and I became really good friends first. So we had this connection. We really knew each other.

'And separate ­bathrooms is key! Although we are very lucky. I know that's not something everyone can have.'