'I'm not smiling much' - Survivor NZ host Matt Chisholm's move to seek help with mental health

Survivor NZ host and Sunday presenter Matt Chisholm has opened up about taking the first step in seeking help with his mental health, inspired by his late workmate Greg Boyed.

"I'm buggered," he captioned an Instagram selfie outside a doctor's surgery.

"My head hurts; it's not working as well as it was. I'm not smiling much...laughing even less.

"I promised Greg, my old workmate, before he died from depression... I'd go see the doc."

Chisholm's former colleague, Boyed, died suddenly in August while on holiday in Europe. A statement from his family confirmed that the 48-year-old TVNZ presenter and journalist had been battling depression.

"It's taken me months, cos of you know, life," Chisholm continued.

"But, Greg me old mate... today, I took that first step," he finished, with the hashtag #itsokaynottobeokay.

Fans and friends rallied around the broadcaster in the comments section, dubbing him "an inspiration" for being open about his struggle and making the decision to get help.

"From one stranger to another, I'm proud of you. And I hope you know your courage might have just saved lives," one commenter wrote.

"Thank you for speaking up. It's so important for people to know they aren't alone and there is no shame in getting the help you need. You are what NZ needs," said another.

Last year, Chisholm opened up to Woman's Day about his sobriety, having quit drinking in 2010 after "almost two decades of problem drinking".

Where to find help and support: