Samuel (born Shmuel) Horwitz (March 11, 1895 – November 22, 1955), known professionally as Shemp Howard, was an American actor and comedian. He is best known today for his role as the third stooge in the Three Stooges, a role he first portrayed at the beginning of the act in the early 1920s (1923–1932) while the act was still associated with Ted Healy and known as "Ted Healy and his Stooges", and again from 1946 until his death in 1955. Between his times with the Stooges, Shemp had a successful film career as a solo comedian.

He was born in Manhattan, New York and raised in Brooklyn, the third-born of five Horwitz brothers, sons of Lithuanian Jewish parents. Moses - professionally known as Moe Howard - and Jerome - professionally known as Curly Howard - were his younger brothers.