Image Credit: Billboard via Getty Images Leon Thomas III is having a well-deserved breakout moment. The singer, songwriter, and producer - once known to Nickelodeon fans as Andre Harris on Victorious - has evolved into one of R&B's most exciting voices. After years of working behind the scenes for artists like SZA, Drake, and Ariana Grande, Leon stepped fully into the spotlight with his acclaimed album MUTT, which earned him multiple nominations at the 2026 Grammy Awards. Here's everything to know about Leon Thomas III, from his early days and creative collaborations today.