He has been isolating in Malibu, California, with his partner Lauren Silverman and son Eric.
And Simon Cowell looked cheery behind his white face mask as he showed off his new svelte physique.
The music mogul, 60, looked trim as he gave a thumbs up while heading to the shops.
It’s a yes from me: Simon Cowell, 60, showed off his slender physique as he popped out wearing a face mask in Malibu
The Britain’s Got Talent judge cut a casual figure in a tight-fitting dark t-shirt showing off his ripped arms.
Cowell completed his ensemble with a pair of baggy blue jeans and casual slip-on shoes.
The TV personality recently revealed he has lost 20lb from cutting out sugar from his diet and going on a fitness regime.
Toned: The music mogul showed off his ripped arms and slim figure in a tight-fitting t-shirt for the lockdown outing
It comes after Simon and his girlfriend Lauren Silverman were praised for donating £320,000 ($400,000) to a dogs charity.
They made the huge contribution as was revealed by presenter Lizzie Cundy on Instagram on Thursday.
Lizzie took to Instagram to announce the news with a snap of her alongside Lauren, writing: ‘My fabulous friends @simoncowell and Lauren Silverman have generously donated an incredible $400,000 to our K9 friends of Barbados.
Kind: Simon and his girlfriend Lauren Silverman, 42, have once again been displaying their generosity by donating £320,000 ($400,000) to a dogs charity
‘Their kindness is overwhelming and such fantastic news for our furry friends.’
This isn’t the first time Simon has showed his generosity, as last year he also donated £190,000 ($250,000) to the canine cause.
Simon has three beloved pooches, called Squiddly, Diddly and Freddy.
Amazing: Lizzie Cundy took to Instagram to praise Simon and Lauren for the kind gesture, with a snap of her friend
Simon also recently shared a behind the scenes snap of himself and son Eric as they record their parts for the new animated Scooby Doo film together
The music mogul, 61, is slated to play himself in the children’s film while Eric is listed to voice the character of ben in the star-studded movie, Scoob!
Simon also shared a still which shows an animated version of himself sat around a table with the show’s main characters; Velma, Daphne, Fred, Shaggy and Scooby.
Aww! Simon recently shared an adorable photo of himself and son Eric as they record their parts for the new animated Scooby Doo film together
The TV judge revealed that the film is an origin tale about how the gang all meet, which is something that hasn’t been revealed before in the franchise.
In the caption, Simon discussed his pride at working with his little boy, and said: ‘I watched Scooby Doo as a kid and now I’m thrilled to be watching it again with my son Eric.
‘So when we got asked to be in the new Scooby Doo movie ‘@SCOOB!’, it was the quickest yes I’ve ever said.
The gang’s back together! Simon also shared a still which shows an animated version of himself sat around a table with the show’s main characters; Velma, Daphne, Fred, Shaggy and Scooby
‘We never really got to find out how Scooby and Shaggy met the rest of the gang and now we do.
‘It’s brilliant and what’s more brilliant is that you will be able to watch it at home on May 15.’
The film also features Mark Wahlberg, Zac Efron, and Amanda Seyfried and was set to premiere in cinemas across the UK on May 15.
Due to the coronavirus pandemic the film is being launched on digital services.