"Police were breaking down the door, and drugs were stashed in toilets."
You'll likely know he's married to wife, Rosie, and has two kids, Indie and Marley, who he regularly posts on his social channels. To an outsider, they look like the perfect family - always smiling, kids eating fruit and veg (without hurling on the carpet), making living an active lifestyle look easy.
Yet it hasn't always been easy for Wicks, as he's shared for the first time in a new BBC documentary, Joe Wicks: Facing My Childhood.
Far from it, actually. While the national treasure was growing up, both parents had mental health issues, which he's touched on before, but never gone into much detail about - until now.
Looking back on his turbulent childhood in the new programme, Wicks shared that his mother left when he was 12 and his brothers aged 14 and one.
Calling her "brave", he shared that she left to undergo five months of therapy for her debilitating obsessive compulsive disorder (OCD) - yet it meant the children were in the care of their father, who was addicted to heroin at the time.
Of his Mum's illness, he shared: "I couldn't walk through the door without taking my shoes off or have friends round. If I'd known I would have been nicer to her and loved her more."
But he understands that she had to do what she had to do to get better, and reflects on this in the programme, adding: "For her to leave a one-year-old with a heroin addict, how hard that must have been... She knew if she didn't go, her whole world was going to fall apart. She did something really brave," he shared with The Mail Online.
He further detailed that his older brother Nikki, who is now Joe's manager and a core part of The Body Coach team and franchise, tried to shield him from the harsh realities of their family situation.
"The worst thing as a kid is that you feel like it's your fault, you feel like you're to blame, or that you're not worth enough, or your parents don't love you enough. Those feelings are hardcore man, you can't carry them as a kid."
He also added that Joe, his brother, "saw police breaking down the door and.. drugs being stashed in toilets."
The TV series - which has been produced by well-known documentary-maker and presenter Louis Theroux - came about after Theroux started Wicks' workouts over lockdown.
He's shared previously that the short, sharp, 20 minute workouts Wicks share for free on his platforms helped him to cope and boosted his mental health.
Wicks has shared his story in the hope that, for anyone else who had a turbulent or traumatic childhood, they will know they are not alone. Further, he wants to encourage parents who are struggling with their mental health to talk to their children more openly about it.
Speaking to The Radio Times recently, he shared: "As a young kid, I didn't realise my parents had mental health issues. I just thought my dad was a drug addict and my mum loved cleaning."
"But I was aware I had this ability to share my story, and that hopefully it would inspire people."
Joe Wicks: Facing My Childhood will air on BBC One on May 16 at 9pm.
Marie Claire Newsletter
Celebrity news, beauty, fashion advice, and fascinating features, delivered straight to your inbox!
Ally Head is Marie Claire UK's Senior Health, Sustainability, and Relationships Editor, nine-time marathoner, and Boston Qualifying runner. Day-to-day, she works across site strategy, features, and e-commerce, reporting on the latest health updates, writing the must-read health and wellness content, and rounding up the genuinely sustainable and squat-proof gym leggings worth *adding to basket*. She's won a BSME for her sustainability work, regularly hosts panels and presents for events like the Sustainability Awards, and saw nine million total impressions on the January 2023 Wellness Issue she oversaw. Follow Ally on Instagram for more or get in touch.
From embracing open-hearted love to avoiding hair bleach, Dua Lipa shares the biggest lessons life has taught her
Plus, why a big coat is an absolute must
By Shannon Lawlor
The A-list pulled out all the stops for Milan Fashion Week
No FROW is complete without a few celebs
By Jazzria Harris
Meet the revolutionary serum for cellular-level skin rejuvenation
Orveda's The Omnipotent Concentrate targets 'zombie cells' for ultimate youth renewal, delivering on its bold promise thanks to years of research and skin-friendly formulas
By Lisa Oxenham