If you’ve noticed that Pretty Little Liars star Keegan Allen (Toby) has been growing his hair out, this is just the beginning. The actor is working towards donating his tresses for a good cause: Locks of Love. Check out the Instagram explanation!

“Growing my hair out for locks of love. Thank you PLL family and friends for being so supportive! Donate your hair!” Keegan tweeted, along with an Vine video of his studly self showing his longish locks from all angles: “Growing my hair out long for Locks of Love,” he says in the video. “Donate your hair.” Then, he gives a thumbs up because thumbs ups are cool, obviously.

Locks of Love is a non-profit charity that accepts money and hair in support of their mission to make wigs for children who have lost their hair due to a medical condition. Hair donations need to be at least 10 inches in length, which means Keegan has quite a bit to go before he can chop off his ponytail and donate it to the cause. Honestly, we think Toby is about to upstage Caleb for the coolest hair in Rosewood.

Keegan is all about making a positive difference. Last spring, he auctioned off a date with himself to raise money for the UCLA Lab School, “an innovative school for children and a laboratory for teachers and researchers.” Last summer, he used his musical talents to raise money for The Nancy Davis Foundation for Multiple Sclerosis by auctioning off a private concert (for four) in Las Vegas, complete with limo ride, dinner, and personal serenade. Such a do-gooder!

Pretty Little Liars Season 5 premiere on Tuesday, June 10, 2014 at 8 p.m. ET on ABC Family.

Kayti Burt is a contributing writer for Wetpaint Entertainment with a penchant for all things pop culture. Follow her on Twitter and Google+!