An Australian suicide prevention charity has been overwhelmed with orders after actor Chris Hemsworth wore one of its hoodies.

Hemsworth was snapped wearing the grey hoodie emblazoned with the charity’s name while on the set of Thor in Brisbane’s CBD.

LIVIN is a not-for-profit suicide prevention group co-founded by Queenslanders Casey Lyons and Sam Webb.

It aims to get young people to talk about their feelings, issues and problems using the mantra: “It ain’t weak to speak.”

Mr Lyons said more than 100 orders were made on Monday for the grey hoodie.

“That’s phenomenal for us,” he said.

“We’ve been running around like chickens with their heads cut off.

“We would have sold a lot more if we had [stock].

“It’s very humbling, but … we’re always humble at any sale we make. It’s a thrill to see anyone wear our merchandise.”

A good friend helps the cause

The charity produces its line of clothing, including jumpers, singlets, hoodies and caps, as a way to raise funds.

Hemsworth saw the clothing on set while filming on the Gold Coast and purchased a hoodie.

“It was luck for us really,” Mr Lyons said.

“Our friend who works on sets always wears LIVIN gear.

“He gets asked about the gear and he always tells them the story behind the merchandise and people jump at the chance to wear it and support us.”

Clothing starts conversations

The charity started in 2013 after a close friend of the co-founders, Dwayne Lally, took his own life.

“We wanted to bring hope to where the darkness was, and break the stigma of mental illness and make it normal,” he said.

“We want people to know that they can ask for help.

“Clothing is a great conversation starter.”

If you’re experiencing difficulties, help is available. Call Lifeline on 13 11 14 or beyondblue on 1300 22 4636.

-ABC