He's one of the most well known men in the world of showbiz, but Britain's Got Talent judge Simon Cowell has stepped out looking very unrecognisable in Hollywood!
Showing off the results of his 20lb weight loss, Simon attended the America’s Got Talent quarter finals on Tuesday evening (13th August), looking slimmed down as he wore a grey jumper.
Simon made the decision to adopt a healthier lifestyle after he was rushed to hospital following a collapse at his home in 2017.
Speaking earlier this year, the music mogul admitted he's now following a vegan diet, telling Extra, “I went to see this guy who’s very well-known. And he said to me, after doing some blood work, ‘You can’t have red meat, dairy, sugar, bread or gluten.”
Celebrity transformations slider with cover pic
1 of 33Swipe through to see the most amazing celebrity transformations of all time...
2 of 33Little Mix, then
Perrie Edwards, Leigh-Anne Pinnock, Jesy Nelson and Jade Thirlwall looked very young in 2011 after winning The X Factor. To be fair, they were all teenagers at the time!
3 of 33Little Mix, now
Now the biggest girl band on the planet, the girls look fantastic!
4 of 33Calvin Harris, then
Scottish DJ Calvin Harris pictured here in 2009. Sorry Calvin, but we're not sure that look would be Acceptable In The 80s - OR now.
5 of 33Calvin Harris, now
The 'One Kiss' hit-maker transformed into an A-list hunk, and has dated the likes of Taylor Swift and Rita Ora. Twit twoo!
6 of 33Cheryl, then
Girls Aloud singer Cheryl was just a fresh-faced teenager when she auditioned for Popstars: The Rivals in 2002.
7 of 33Cheryl, now
She's now an on-trend and super-glamorous mum-of-one, even walking the red carpet at a London Fashion Week show.
8 of 33Justin Bieber, then
Little Justin Bieber was just a Baby when he burst onto the scene in 2009...
9 of 33Justin Bieber, now
These days, he's of course grown up - but he looks pretty much the same! Apart from the fact that he no longer has the signature Bieber hairstyle, of course.
10 of 33Rihanna, then
A young Rihanna in 2005...
11 of 33Rihanna, now
The still cheeky Fenty grin is still there, and Rihanna continues to defy the aging process.
12 of 33Matthew Lewis, then
Harry Potter star Matthew Lewis starred in the film series as Neville Longbottom from 2001 to the last film in 2011, here pictured in 2004 at the Harry Potter and the Prisoner of Azkaban premiere.
13 of 33Matthew Lewis, now
Matthew grew up into such a good-looking chap that the makeup department on the Potter films had to try and make him less attractive in the later films, even spawning the phrase 'Longbottomed'.
14 of 33Miley Cyrus, then
Miley Cyrus in her Hannah Montana days...
15 of 33Miley Cyrus, now
She may have gone through various transformations, but Miley is still recognisable.
16 of 33Gareth Gates, then
Pop Idol contestant Gareth Gates on the show back in 2001...
17 of 33Gareth Gates, now
Here in 2017, he showing off his muscular physique alongside his girlfriend Faye Brookes.
18 of 33Katy Perry, then
Katy Perry rocking long black hair in 2004...
19 of 33Katy Perry, now
And showing off her shorter, blonde pixie cut in 2017.
20 of 33Chris Pratt, then
Jurassic Park actor Chris Pratt back in 2008...
21 of 33Chris Pratt, now
Shed the pounds and now has a slimmer physique.
22 of 33Kylie Jenner, then
A fresh faced Kylie Jenner in 2008...
23 of 33Kylie Jenner, now
Now rocking a platinum blonde 'do at the age of 21 in November 2018.
24 of 33Zac Efron, then
Zac Efron in his High School Musical days back in 2007...
25 of 33Zac Efron
10 years later, he was looking incredibly dapper at the Australian premiere for The Greatest Showman in 2017 - even sporting a 'tache.
26 of 33Justin Timberlake, then
JT rocking his epic tight curls with frosted tips back in 2000...
27 of 33Justin Timberlake, now
He's so much more grown-up in September 2018 whilst performing in Las Vegas.
28 of 33Johnny Vegas, then
TV personality Johnny Vegas, real name Michael Pennington, is well known for his larger frame.
29 of 33Johnny Vegas, now
But in 2018, he revealed that he'd lost two stone.
30 of 33Jack Ryder, then
Jack Ryder, AKA Jamie Mitchell from EastEnders, was a noughties heartthrob if ever there was one.
31 of 33Jack Ryder, now
In 2018, Jack was announced to be joining Holby City - and look at him now!
32 of 33Jonathan Tapper, then
Gogglebox's Jonathan Tapper was 21st 3lbs at his heaviest whilst appearing on the show with his family - wife Nikki, daughter Amy and son Josh.
33 of 33Jonathan Tapper, now
But with the help of a diet plan, Jonathan was able to lose a whopping three stone in just 12 weeks, and six inches off his waist!
Meanwhile, Simon is a very busy man at the moment. As well as filming for America's Got Talent, the 59-year-old is also about to appear on Britain's Got Talent: The Champions in the UK, alongside Alesha Dixon, David Walliams and Amanda Holden.
Despite the acts for the show not yet being confirmed, the new concept will showcase the talent from previous Britain's Got Talent acts, since the popular show first started back in 2009.
Earlier this month, ITV confirmed the show will return this August, writing, 'Let the battle commence! 💪 Britain's Got Talent: The Champions starts this August on @ITV and @WeAreSTV 👑 Which of these legendary acts are you excited to see again? #BGTChampions'. [sic]
Britain's Got Talent: The Champions hits our TV screens in August.
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