Leslie Knipfing was born in Mineola, New York. She is the daughter of Janet and Joseph Valentine Knipfing Jr.
Leslie is the sister of comedian-actor Kevin James and Gary Knipfing, who is also known as Gary valentine, the comedian. Leslie’s father owns an insurance agency whereas her mother is a homemaker and has worked as an assistant to a chiropractor. She is of German descent.
Leslie wanted to be an actor like her brothers but she could not fulfill her dreams. She suffers from sight problem. Leslie was connected with the charitable work ‘Retinitis Pigmentosa’ which works for people with eyes problem. She is suffering from retinitis pigmentosa herself. She is engaged with an organization and helps the poor children by solving their problems. Apart from her charitable work, her other works remain undisclosed. By the help of her brother, she runs an awareness campaign about the diseases that she has been suffering from
According to sources her brother Kevin's net worth is $80 million, Leslie has a net worth of about $1.5 million. She does not earn a handsome salary like her brother but in spite of not being the star, she is doing quite well. No one knows much about Leslie’s personal life. Media have collected nominal information about her affairs, boyfriend, spouse divorce, and children. She was seen randomly with many men but has not confirmed any of her affairs yet. As Leslie is not a star, paparazzi do not follow her. That is the reason why less news are found about her. She shares a strong bond with her brother both personally and professionally. She is usually appreciated by her brother Kevin because Leslie is handling all the schedule and appointment of Kevin.
She manages her philanthropic life by earning enough blessing from poor. Leslie and her brother continue their social welfare to upgrade the people who suffer from the eye problem, 'Retinitis Pigmentosa' . She tries to help retinitis pigmentosa because she knows how it feels like to be a person suffering from such grave eye problem.