Best known as the younger brother of Stranger Things star Gaten Matarazzo.
His brother made his acting debut in a 2015 episode of The Blacklist.
He and his brother share a YouTube channel called The M&M bros Gaten & Carmen Matarazzo.
Born to Heather and Gaten Sr., he has two siblings, Gaten and Sabrina.
In Stranger Things, his brother Gaten stars alongside Finn Wolfhard, Millie Bobby Brown, and Caleb McLaughlin.