Rod Stewart, 78, celebrates his sister Mary’s 95th birthday with his wife Penny Lancaster, 52, and their sons as they enjoy a night out at The Ritz

Rod Stewart celebrated his sister Mary's 95th birthday with a family night out at The Ritz Hotel.

The hitmaker, 78, was joined by his wife Penny Lancaster and their two sons as they posed for fun Instagram photos during the outing.

Penny, 52, looked chic in a sleek cream suit as she posed for a photo with her sister-in-law Mary, son Alastair, 18, his girlfriend Eloise Darlington and son Aidan, 12.

She captioned the post: 'Happy 95th birthday Mary, we love you @alastairwstewart @aidenstew_1888 @sirrodstewart @eloisedarlington.'

Rod, the youngest of five children, also posed for a photo with his glamorous sister on his Instagram Stories and wrote: 'Happy 95th sister Mary.'

Rod, the youngest of five children, also posed for a photo with his glamorous sister on his Instagram Stories and wrote: 'Happy 95th sister Mary'

Rod is the youngest of Bob and Elsie Stewart's five children, and during his six decades in the spotlight, he has repeatedly praised his brothers, Don and Bob, and sisters, Mary and Peggy, for caring for him when he was young.

The world-famous singer was born in London in 1945 after his family moved south, while his four older siblings were born in Scotland. There were eight years between him and his closest brother.

After Peggy died in 1975 at the age of 40, and Don and Bob – who were both in their 90s – died last year, Mary is Sir Rod's only surviving sibling.

As an aspiring footballer in his youth, Sir Rod drew attention to the way his siblings supported him in every way, including washing his 'dirty pants' after training.

But as he got older, the father of eight decided he wanted to pursue a career in music – something he also credits to his siblings.

Speaking at Mary's 90th birthday party in 2019, for which his older siblings jokingly booked Rod Stewart impersonators to perform, the star paid tribute to how his older sisters and brothers had been 'instrumental' in helping him to get into music.

The Sun reported that he told the crowd: 'Whether it was football or washing my dirty underpants, I can't speak highly enough of these boys.

“We've had our arguments, haven't we, Don? A blow now and then, but I love you, and I love you, Mary.”

Rod has often praised his siblings for supporting him throughout his career. The four siblings are incredibly close, but they lost their sister Peggy in 1975 at the age of 40.

Sir Rod, Mary, Don and Bob formed a special bond after the death of their sister Peggy, who died in 1975 aged 40 from multiple sclerosis.

The music legend welcomed his eldest child, a daughter Sarah Streeter, in 1963 when he was 17 years old with his then-partner Susannah Boffey.

He then welcomed daughter Kimberly, 44, and son Sean, 43, with his ex-wife Alana Stewart, whom he divorced in 1984.

Rod also shares Ruby, 36, with former model Kelly Emberg, and has daughter Renee, 31, and son Liam, 29, with New Zealand model Rachel Hunter.

It comes after Penny shared a splashy tribute to her eldest son on Instagram on his 18th birthday.

She shared a series of throwback snaps of herself and Rod with Alastair over the years and gushed about her 'amazing' son in a caption.

She wrote, “My beautiful firstborn son that I had dreamed of for 34 years of my life came to me as a gift that I have always cherished. Happy 18th birthday. So proud of the amazing man you have become xxxx.'