Simon Cowell's suit hangs off his slimmer frame as he enjoys rare night out ...

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He rarely makes red carpet appearances with any of his four brothers.

But Simon Cowell brought along older sibling Tony to the Together For Short Lives Winter Ball in London on Tuesday evening, enjoying a night out with each of their other halves.

While Simon, 60, posed on his own, showcasing his slimmer frame in a loosely-fitting suit, Tony, 69 joined him for more snaps.

Simon Cowell brought along older sibling Tony to the Together For Short Lives Winter Ball in London on Tuesday evening, enjoying a night out with each of their wives [L-R Emma Lloyd-Cowell, Simon, Lauren Silverman and Tony]

Simon Cowell brought along older sibling Tony to the Together For Short Lives Winter Ball in London on Tuesday evening, enjoying a night out with each of their wives [L-R Emma Lloyd-Cowell, Simon, Lauren Silverman and Tony]

Simon's partner Lauren Silverman, 42, and Tony's wife, Emma Lloyd-Cowell, 41, joined their husbands for the occasion.

Lauren looked sleek in a black off-the-shoulder cocktail address, which she teamed with strappy heels.

She let her raven locks cascade around her delicate features, highlighted with a gentle tone of make-up.

She completed the look with silver drop-earrings. 

Baggy: Simon, 60, also posed on his own, showcasing his slimmer frame in a loosely-fitting suit

Baggy: Simon, 60, also posed on his own, showcasing his slimmer frame in a loosely-fitting suit

Evening out: Simon's partner Lauren Silverman, 42, joined him on the red carpet

Evening out: Simon's partner Lauren Silverman, 42, joined him on the red carpet

Sleek: Lauren posed in a black off-the-shoulder cocktail address, which she teamed with strappy heels

Sleek: Lauren posed in a black off-the-shoulder cocktail address, which she teamed with strappy heels

Simon's sister-in-law Emma is the Head Of Philanthropy And Special Events for the charity, which aims to help the 49,000 seriously ill children and their families across the UK make the most of every moment they have together. 

Simon has five siblings in total, although only one of them - Nicholas, 58 - is from both his parents Julie and Eric. He had another brother, Stephen, who tragically died as a baby.

Tony's mother was Jeannette Cowell, a former-wife of his and Simon's father Eric, who died in 1999.

Simon's five-year-old son Eric is named after

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