Leslie Knipfing is a name that will not ring a bell, yet she is part of one of Hollywood’s most famous families. The sister of actor and comedian Kevin James, Leslie has gone a different path from the glitz and glory of the show business. We’ll talk about Leslie Knipfing’s early life, career, family, physical traits, net worth, and her hopes for the future in this article. Early LifeLeslie Knipfing was born to Janet and Joseph Valentine Knipfing Jr. on November 17, 1974, in Mineola, New York. She had two brothers who were older than her, Kevin James (Kevin George Knipfing at birth) and Gary Valentine (Gary Joseph Knipfing at birth), and she grew up in a Catholic home.