Mark Ruffalo has done his bit to raise awareness of male breast cancer.

The actor stripped off to reveal his bare chest, his shirt undone and hanging off his arms, while pointing at his nipple in a photo shared on his Twitter and Instagram pages, in order to help make the issue more commonly known.

Along with the meaningful image on Twitter, the handsome Avengers actor wrote: 'Men get breast cancer too. I'm supporting @One4TheBoys #InTheNipOfTime campaign.'

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Doing his bit: Mark Ruffalo stripped off to reveal his hairy chest in a social media selfie in order to raise awareness of male breast cancer, and One For The Boy's #InTheNipOfTime campaign

He also included a link to a site - One For The Boys - in order for those interested to learn more.

In his Instagram post, the 47-year-old - who boasts an incredibly hairy chest - explained further: 'Here’s a selfie I’m not used to. I’m supporting @One4TheBoys​’ #InTheNipOfTime campaign, because men get breast cancer too.'

And his bold efforts seemed to have worked, as the image was shared on Twitter over 1,300 times.

The bearded Hulk actor is the latest in a line of famous faces to get behind the drive to bring male breast cancer into the spotlight.

Joining the charge: As well as Mark and Samuel L Jackson, Harry Potter actor James Phelps also got involved as he posted a topless photo online for the good cause

He followed the lead of Hollywood heavyweight Samuel L Jackson, who also shared a picture of his nipple, but an extreme close-up.

The 66-year-old actor wrote: 'Checkin' Myself before I Wreck Myself!! Taken #InTheNipOfTime All in aid of @One4theBoys Get Ur Nips Out! Your Turn!'

And Harry Potter actor James Phelps, who portrays Fred Weasley in the films, also shared a shot of himself topless.

He added, while trying to get other men to take part: 'I’m supporting #InTheNipOfTime, because men get breast cancer too! Your turn! @One4TheBoys.'

Working man: On Tuesday, Mark was out on the red carpet at the premiere of his new movie Spotlight, alongside co-star Liev Schreiber

Family man: Mark happily attended the premiere with his gorgeous wife Sunrise Soigney and their son Keen

October is annual Breast Cancer Awareness month, but the focus is mainly on women - breast cancer is the most common cancer in females.

But the One For The Boys campaign aims to make men realise that breast cancer is also a notable threat for them, too.

According to their website, their main objective is 'to get men talking about cancer by removing the myths around it, and changing their attitudes towards their health.

'By bringing some blue to what seems to be a very pink world, we aim to get men paying more attention to their bodies when something might be wrong.'

While a relatively uncommon form of cancer in men, it kills over 70 men a year.

Meanwhile, away from his charitable efforts, Mark has been busy promoting his latest movie, Spotlight.

The handsome gent appeared alongside his co-stars Liev Schreiber and Stanley Tucci at the New York premiere of the film on Tuesday, joined by his wife Sunrise Coigney and their son Keen.

Spotlight, which also stars Rachel McAdams, tells the true story of how the Boston Globe shook up the Catholic Church by uncovering a massive child molestation scandal and cover-up within the local Catholic Archdiocese.