Leslie Knipfing: Bio, Age, Career, Edu, Net worth & More

Leslie Knipfing
Leslie Knipfing

Who is Leslie Knipfing?

Leslie Knipfing is sometimes mistakenly linked with Leslie Bibb due to their great resemblance, however they are two distinct people with different backgrounds. Although Leslie Knipfing is basically the sister of famous performers Kevin James and Gary Valentine, tabloids have disseminated lies based on which has caused chaos.

A simple search for Leslie Knipfing produces results mixed with personal details and images of Leslie Bibb, therefore spreading the misreading of their marketable personas. In any event, it’s important to clarify that Leslie Knipfing and Leslie Bibb are separated people who end up sharing a resemblance, which adds to the chaos covering their characters.

Quick Bio


Full name Leslie Knipfing
Date of birth November 17th, 1974
Zodiac sign Scorpio
Place of birth New York City, United States of America
Nationality American
Religion Christianity
Profession Charity event manager
Parent’s names Joseph Valentine Knipfing Jr. and Janet Knipfing
Siblings Kevin James and Gary Joseph Knipfing
Marital status Unmarried


Age of Leslie Knipfing

Knipfing was born on November 17, 1974, which makes her 49 years, 4 months, and 19 days old right now. Every year on November 17, she looks forward to one more trip around the sun, celebrating her birthday with happiness and thought. As time goes on, her birthday becomes a time to stop and think about the journey she has been on so far and the adventures she is looking forward to.

Leslie Knipfing Education

During her time in secondary school, Leslie Knipfing walked the halls of Ward Melville Secondary School, breathing in the lively air of learning and growth. Not long after that, she left on her trip to get a higher education at the College of US. For reasons that are still unknown, the main topic of Leslie’s exams, she graduated from college with a degree whose details are still a bit vague.

It’s unclear what Leslie was interested in in school, but it’s clear that it played a big role in shaping her personality and giving her the tools she needed to deal with life’s unexpected and exciting turns. Without a question, her time in school left a lasting impression on her trip, whether she chose to follow her interests or discover new opportunities along the way.

Leslie Knipfing

Leslie Knipfing family background

According to Janet Knipfing and Joseph Valentine Knipfing, Jr., Leslie Knipfing is their youngest child. A German-American, her dad is Joseph. And that means she comes from both Germany and the United States.

Leslie Knipfing was born on November 17, 1974, in Mineola, New York, USA, according to some reliable sources. She’s 49 years old now, in 2024.

Kevin James (full name Kevin George Knipfing) and Gary Valentine (full name Gary Joseph Knipfing) are Leslie’s older brothers.

They were all raised Catholic, including her two brothers. She didn’t go to a specific school because she was raised Catholic, but we think she did go to a Catholic school. 

Leslie Knipfing Parents

The mother of Leslie Knipfing, Janet, worked as a doctor. While her dad, Joseph, ran an insurance business. FamilyTron says that Leslie’s dad, Joseph Valentine, died on January 30, 2006, after a long battle with coronary heart disease. He was 75 years old. But as of now, there is no formal confirmation of this fact.

Personal Life

Leslie Knipfing is very beautiful, but she has kept her personal life quiet. This has made her friends and admirers curious about her relationships. Her love life is still a mystery, as there are no clear facts available.

At this point, Knipfing doesn’t seem to have a boyfriend or girlfriend in her life. Even though Kevin and Gary, her brothers, are married, Leslie seems happy to live her life her own way and keep her relationships private.

Kevin married Steffiana de la Cruz in 2004 and they were happy together forever. Since they got married, their relationship has grown, and now they have four happy children living with them. 

Leslie Knipfing as Sister of Famous Comedians

Kevin Valentine and Gary Valentine are her famous brothers who work in show business. Before they became actors, producers, and directors, they were both stand-up comics.

Gary left his home town after becoming a famous stand-up comic. He moved to Los Angeles and went on many talk shows there, such as “The Late Late Show” with Craig Kilborn, “Late Night with Conan O’Brien,” and “The Tonight Show with Jay Leno.”

On the other hand, Kevin started out as a stand-up comic on Long Island. After that, he went on many talk shows, such as “The Tonight Show with Jay Leno,” “The Late Late Show,” “The Rosie O’Donnell Show,” and “The Ellen DeGeneres Show.”

However, the brothers’ fame went through the roof after working on The King of Queens. Kevin made the comedy show and played the lead part of Doug Heffernan. Gary played Doug’s cousin, Danny Heffernan. From 1998 to 2007, 207 episodes of the show ran.

Height of Leslie Knipfing 

Knipfing is about average height and level 5 feet 9 inches. That little detail adds to the amazing essence of who she is as a person.

Leslie Knipfing

Career & Achievements

There are many hats that Leslie Knipfing has worn on her way to becoming a professional. She has proven herself to be a great multitasker by planning events for good causes that affect many people’s lives and researching the charm and beauty of Hollywood details. Her unwavering support for her brother Kevin James, however, is what really sets her apart, whether it’s working hard in the background or taking care of his relationship.

Furthermore, we shouldn’t forget the praise she’s received for her ongoing hard work. Winners and selections at prestigious grant events show how dedicated and skilled Leslie is. Every time Leslie sets up an event, she makes history by showing off her skills and energy in a cautious and skilled way.

Movies and TV Shows

Even though Leslie Knipfing isn’t as well-known as her brother Kevin James, she has made a lot of progress in the media. Her acting skills and versatility have been shown in a number of movies and TV shows.

Leslie played a major role in the movie “Here Comes the Blast” that showed off her comedic timing and charm. In “Adults 2,” her performance showed that she could stand her ground next to professional artists while dressed in a funny way.

When it comes to TV, Leslie has been in well-known shows like “Kevin Can Stand by” and “Ruler of Sovereigns.” These jobs gave her a chance to show how versatile she was as an actress, from telling funny stories to believable portrayals of real events.

Leslie’s performances stand out and are praised in the business, even though she isn’t as well known as her brother. Her ability to captivate large groups of people and leave a lasting impression says a lot about how good she is at what she does and how much she loves it.

By continuing to pursue her playing career, Leslie Knipfing shows that she is more than just a famous performer; she is a skilled performer in her own right, having an effect on screens of all sizes. 

Net worth

Knipfing’s estimated total assets are around $1.5 million. This may not be as much as some celebs’ fortunes, but she’s pushing herself to get ahead. Spending what you already have is much more important than saving up a huge amount of money.


Leslie Knipfing lives a private life away from the fame of Hollywood. She is the sister of actors Kevin James and Gary Valentine. Taking on retinitis pigmentosa, Leslie builds on the work that her brother Kevin started. Even though Leslie isn’t as well known as her brothers, she has changed the media by appearing in movies and Network shows. It was estimated that she has $1.5 million in assets, and she has a small following on Instagram.


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