The 40-year-old singer welcomed his first child – daughter Madison – with wife Amelia last month.
But there’s no sign of a ‘dad bod’ anywhere as Olly has revealed his incredibly ripped physique in pictures from his training sessions while on tour with Take That.
Olly spent some time training with veteran boxing coach Dave Coldwell at his Rotherham gym while in Sheffield and Leeds supporting the boy band.
Sharing snaps of them together on Instagram, Dave wrote: “‘We had a great few days in the gym with Olly. He can sing, dance, work on TV and play football and it turns out he can box a bit too…it makes you sick!
“The man can punch! He swapped the dancing shoes and mic for boxing boots and gloves in between supporting Take That on their tour. The boy done good.”
Olly replied: “Appreciate your time + energy mate! Till next time… I’ve got my notes.”
The star recently opened up about his passion for boxing, writing on Instagram: “I don’t normally post anything boxing related but after 18 months of doing it and learning the basics I genuinely watched a video [of himself training] and for the first time liked what I saw.
“It’s been a hard slog! So f*** it, I’m posting it! Learning to box from scratch is hard work.
“I’ve been consistent and Amelia will tell you all ‘I’m one of those guys now’ everywhere I go I’m shadow boxing trying to improve!”
He then offered advice to his followers, writing: “If you’re thinking of going into any combat sport, take it seriously, be patient, be consistent and you will see results.”
Meanwhile last week, Olly got in the ring with legendary boxer Ricky Hatton for a sparring session.
Sharing a video, Olly delivered a few blows to Ricky’s pads before the 45-year-old sent the singer flying to the ground.
Olly captioned the footage: “Ricky “Hit me” Hatton.”
The X Factor star celebrated his milestone 40th birthday on Tuesday, and paid a touching tribute to his baby girl.
Sharing a picture of him cradling Madison in his arms, he wrote: “The only gift I wanted for my 40th was to be daddy and here you are xx love you Madi.”
Ricky Hatton’s biggest boxing wins
Ricky Hatton tasted defeat just three times in an illustrious 46 fight career that saw him earn an estimated £37million in prize money. Here are some of his most memorable victories:
Jon Thaxton on points – Ricky picked up national honours when he defeated Thaxton for the vacant British light-welterweight strap at Wembley Conference Centre in 2000
Kostya Tsyzu retired – In front of a rapturous home crowd inside Manchester’s MEN Arena, Ricky became a world champion for the first time. He won the IBF and The Ring light-welterweight titles against the former undisputed champ Tsyzu
Luis Collazo unanimous decision – Just three fights later Ricky added to his title collection, claiming the WBA light-welterweight title stateside by beating tough Collazo over 12 rounds
Paulie Malignaggi TKO – Ricky’s final boxing victory came against loud-mouthed American-Italian fighter Malignaggi in Las Vegas. The Hitman let his fists do the talking and stopped his foe in the 11th round. He earned a cool $2.5million for his night’s work.
Six months later Ricky would taste defeat for a second time, the first being against Floyd Mayweather in 2007, against Phillippino superstar Manny Pacquiao. He suffered a brutal second round knockout and was taken to hospital for a precautionary brain scan