While he's back in the limelight, the star isn't ditching his new clean-living lifestyle as he was seen sipping from a bottle of his favourite low-calorie beer on Monday night.
The 62-year-old TV and music mogul was in good spirits as he was driven home from his day at work, enjoying a tipple on the back seat.
This is the life: Simon Cowell was seen sipping from a bottle of his favourite low-calorie beer as he was driven home from Britain's Got Talent on Monday night
The star, who has lost 20Ibs over the past two years, appeared to be drinking a bottle of Skinny Lager, a low-calorie, vegan beer that he was rumoured to have invested £500,000 in last year.
The music mogul has overhauled his lifestyle in recent years, and one of the changes he's made is to opt to drink Skinny Lager when he fancies a tipple, reportedly enjoying two bottles a night.
A report last year stated Simon has become such an 'absolute devotee' to the drinks - which have just 89 calories per bottle - he decided to invest in the company.
The star overhauled his lifestyle after breaking his back in 2020 when he crashed his electric bike near his Malibu home and now has regular sleeping and exercise habits, and he has lost more than 20lbs.
Healthy lifestyle: Simon' has overhauled his lifestyle since breaking his back in 2020, ditching his heavy drinking and embarking on a diet and fitness plan to lose 20Ibs (pictured right in September 2018)
He suffered complications from surgery to fuse to vertebrae, which required him to mostly stay in bed for six months
As well as now walking 40 miles a week, The X Factor boss rearranged his work schedule to ensure he only starts business meetings after 9am rather than hold conferences into the early hours of the morning like he used to.
A source previously MailOnline: 'Simon said how he hasn't worn trainers as much as this in 20 years. He feels fitter than ever before and is keeping to a normal routine rather than being on the phone until into the early hours of the morning.