This is a post siphoned-off from the Young Actors post to make for easier reading/browsing that also reflects the changes in the Youth Acting categories in recent years. In 2010 the sing category was split into two unisex categories (Lead and Supporting). In 2011 Lead and Supporting categories for both genders were created.
2018 Sam McCarthy All These Small Moments
2017 Finn Wolfhard It
2016 Harvey Scrimshaw The Witch
2014 Tye Sheridan Joe
2013 Kodi Smit-McPhee Romeo and Juliet
Best Performance by a Child Actor in a Supporting Role
Though both actors and actresses were eligible for, and nominated for, this prize the winner was Janina Fautz.