Paddy McGuinness says his ex-wife, Christine, was the first person to notice that he was suffering from depression.
The Top Gear presenter said he had no idea that he was experiencing the symptoms, including losing his temper.
Paddy and Christine were married for just over a decade but announced they had decided to split in July 2022 but opted to live with one another to co-parent their three children.
In recent years, Christine who appeared on the Real Housewives of Cheshire opened up about her struggles as well as being diagnosed with autism.
The 49-year-old said he "wasn't aware" of his struggles, before adding: "You can be as low as low can be and it's the people around you that tell you."
Speaking on the Monday Mile podcast, he told Aimee Fuller: "So Christine and a few of my family members would say stuff and ask if I was okay and I would think, 'Why are they always asking me that?'
"But obviously you can't see it yourself, it's in your head, it's not like you've got a limp where people can spot it and you can spot."
He went on to say that he started to "resent" his job of entertaining people as he couldn't face putting on a smile.
"I've never been that much of a person losing my temper but I could feel myself in certain situations getting wound up quicker and I just thought that's not me," he said.
"I wasn't going around throwing cups at the bloody wall and shouting but I could feel myself feeling angry straight away and I shouldn't be feeling that."
"I wasn't going around throwing cups at the bloody wall and shouting but I could feel myself feeling angry straight away and I shouldn't be feeling that."
Paddy explained he tried therapy to help with his struggles but despite it not working at first, he continued with it and eventually found results.
Nowadays, Paddy sees his therapist but no longer on a regular basis, as he previously saw him every week and has check-ins with his doctor every few months to manage his mental health.
"If you try therapy and that doesn't work for you, it doesn't mean that all therapy won't, just keep going until you find that one," he explained before adding: "It might take you bloody six times but it's worth it."
Despite his initial hurdles, Paddy admitted he was "relieved" when he was eventually diagnosed with clinical depression by his doctor.
The star added that after each therapy session, he would often leave the room feeling as though he'd been in a ring with Tyson Fury.
*If you're struggling and need to talk, the Samaritans operate a free helpline open 24/7 on 116 123. Alternatively, you can email jo@samaritans.org or visit their site to find your local branch
