Ahmir Khalib Thompson, known professionally as Questlove, is an American percussionist, multi-instrumentalist, DJ, music journalist, record producer, and occasional actor. He is best known as the drummer and joint frontman for the Grammy Award-winning band The Roots. The Roots have been serving as the in-house band for The Tonight Show Starring Jimmy Fallon since February 17, 2014, as they have for the entire run of the show under Jimmy Fallon.