These Hollywood hotties also have huge hearts.
Some of Hollywood's most handsome hunks are rocking nail polish this month to bring awareness to an issue close to their hearts.
Zac Efron, Chris Hemsworth and Chris' younger brother, Liam Hemsworth, are just a few of the stars taking on the Polished Man Challenge, proudly sporting bright colored polish on one finger during the month of October. The challenge aims to raise awareness about physical and sexual violence against children.
"Happy to paint one nail and be a @PolishedMan this month to say no to violence against children," Zac posted on Instagram on Tuesday, showing off his red polish and thanking Chris for nominating him. "1 in 5 children are subject to physical and/or sexual violence before the age of 18 and that’s one too many. Find out how you can help/donate at http://polishedman.com."
"Being a @PolishedMan isn't just about remembering to buy flowers, how many rounds you shout, or how much you lift," Chris also Instagrammed. "It's about saying no to violence against children. That's why this October I'm painting my nail and asking you to donate to help the 1 in 5 kids globally who are subjected to physical or sexual violence before they turn 18."
And check out Liam's neon green polish of choice.
The challenge is definitely picking up momentum, with Pretty Little Liars actor Tyler Blackburn also helping out for the cause.
WATCH: Gwen Stefani Reveals Why She Paints Her Son's Nails
In August, Kevin Hart, Scott Eastwood, Chris Evans, and more stars participated in the 22 Pushup Challenge to raise awareness of the statistic that an average of 22 veterans commit suicide each day in the United States.
Watch below: