He was 91 and no details on the cause were available, according to his friend, Jeremy Vernon.
Young Lou became part of the act at age 10, joining him in skits.
The act ended when Alexander was drafted into the Marines.

Lou Alexander
Watch on Deadline
From there, he transitioned into a career as an agent and manager.
He worked for New York agent Norby Walters, then branched out on his own.
Later in his career, he made acting cameos inBeverly Hills 90210andMelrose Place.

He is survived by his wife, Arlene Walsh, and daughters Stacy and Rachel.