KIIS FM radio star sends fans into meltdown with shirtless post as he shows off his 'sleeper build'

Kent 'Smallzy' Small has sent his fans wild after stripping off to show off his 'sleeper build'.

The 41-year-old KIIS FM radio star posted a shirtless photo to Instagram this week in which he sported ripping muscles.

However, the media personality hinted in the comments section that the image may have had some help from AI. 

'Haters will say this is AI. I've been busy in the gym. I worked hard for it,' Smallzy wrote. 

His followers were impressed however, with many sharing compliments underneath the racy photo and noting that the star has a 'sleeper build' - which describes someone with an unexpectedly muscular physique normally hidden under clothing. 

'I volunteer as tribute. I'm not sure for what but I volunteer,' joked one person, while another said, 'Need to change your name to Swollzy.'

Another said: 'Not Smallzy anymore more like Bigzy,' with one more writing, 'Is this hotness even legal??' 

'Someone's been busy! Good work and looking forward to hearing you again,' another said. 

It's a big year for Smallzy, as he's set to join KIIS FM radio stars Kyle Sandilands and Jackie 'O' Henderson.

It was revealed at the ARN Upfront26 Smallzy is joining KIIS' iHeartRadio team for 2026 after leaving Nova in August.

Smallzy confirmed the exciting news at the Upfronts in Sydney.

'Yes, I am making the switch to KIIS in 2026! I am so excited to call ARN my new home, from January,' Smallzy told the crowd.

'In my short time I have been dealing with them, the vision, strategy, leadership and support has been incredible! So excited to be joining,' he added, as Kyle and Jackie O came out on stage to congratulate him on the exciting news. 

The big news was also announced by none other than English singer Ed Sheeran, who gushed over his 'old mate's' new gig in a video posted to social media.

'There is a brand new show coming to KIIS in 2026… And the host of the show is… drumroll, please… My old mate, Smallzy!'

He added: 'Can't wait to listen to it. Can't wait to see you again, and congratulations to KIIS as well... for having Smallzy, because he is great!'

The veteran presenter is set to host his own program called The Smallzy Show, which will debut this month.

Also there to congratulate the radio show host via video was Niall Horan of One Direction, who praised Smallzy for being 'a huge part of my career'.

'I've been going on the radio with Smallzy for 10 plus years,' Niall began.

'He's also championed so many artists and supported so many artists over the years too… So I'm delighted he's making the big move to join the iHeartRadio family, which is amazing!' he shared. 

Niall finished off the segment, saying: 'I can't wait to be back on air & back in Oz, having a laugh… I miss Australia very much.'

The Smallzy Show will be heard over two national timeslots on the KIIS Network.