Grant was born into an impoverished family in Bristol, where he had an unhappy childhood marked by the absence of his mother and his father's alcoholism. He became attracted to theatre at a young age when he visited the Bristol Hippodrome. At 16, he went as a stage performer with the Pender Troupe for a tour of the US. After a series of successful performances in New York City, he decided to stay there. He established a name for himself in vaudeville in the 1920s and toured the United States before moving to Hollywood in the early 1930s.
Grant was born into an impoverished family in Bristol where he had an unhappy childhood marked by the absence of his mother and his father's alcoholism. He became attracted to theatre at a young age when he visited the Bristol Hippodrome. At 16, he went as a stage performer with the Pender Troupe for a tour of the US. After a series of successful performances in New York City, he decided to stay there. He established a name for himself in vaudeville in the 1920s and toured the United States before moving to Hollywood in the early 1930s.