'It's not a weakness': William's moving mental health message

Prince William has opened up about the importance of mental health yet again, this time making a special appearance on a UK podcast.

The royal sat down with English footballer Peter Crouch in a special episode of BBC Radio Five Live's That Peter Crouch Podcast, in support of the Heads Up campaign.

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Featuring alongside BBC journalist Tom Fordyce and radio personality Chris Stark, William explained his own approach to mental health and why it's so important to be open about your struggles.

"We all have mental health, and we all have to stay mentally fit," the Duke of Cambridge said on the podcast.

"It's a strength to talk about your mental health, it's not a weakness. You know if you're not feeling well, something's bothering you, talk about it – it's not a problem."

William has spoken many times about mental health over the years, touching on his own battles with anxiety and depression, especially in the wake of his mother, Princess Diana's, tragic death.

The prince also spoke about the Heads Up campaign, a project that has seen the royals team up with iconic footballers to raise awareness for mental health.

It's just one arm of his and Kate Middleton's Heads Together mental health initiative, which aims to "tackle stigma and change the conversation on mental health" in the UK.

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During the podcast, footballer Peter Crouch also opened up about his own experiences with mental illness, telling William: : "I'm in the environment where it's so male-orientated, and any weakness shown is an excuse not to make it.

"When I started talking about it and opened up, I did feel so much better, and that was just through talking."

Earlier this year William spoke about how important it is to change the stigma surrounding men's mental health, appearing in the BBC documentary Football, Prince William And Our Mental Health.

In it he spoke about the "trauma" of losing his mother when he was just 15.

"When you've been through something traumatic, like your dad not being around, my mother dying when I was younger, your emotions come back in leaps and bounds," he confessed to a footballer whose father wasn't in his life.

"Because it's a very different phase of life and there's no one around to help you. I definitely found it overwhelming at times."

Now William is again urging men to speak up about their mental health and encouraging men to be more supportive of their friends and family when dealing with mental health issues.

If you or someone you know is in need of support contact Lifeline on 13 11 14 or Beyond Blue on 1300 22 4636.