Kat Dennings’s Brother, Siblings, and Family

Kat Dennings

Kat Dennings, the talented American actress known for her roles in sitcoms like “2 Broke Girls” and as Darcy Lewis in Marvel productions, has a fascinating family background. Beyond her successful career, her personal life, especially her relationship with her brother, sister, and parents, adds an intriguing layer to her public persona.

Kat Dennings
Kat Dennings

Kat Dennings Brother: Geoffrey S. Litwack

Kat Dennings shares a close bond with her older brother, Geoffrey S. Litwack. Born in Wynnewood, PA, Geoffrey is not only Kat’s brother but also a staunch Pennamite, known for his readiness for a second war with Connecticut.

In 2023, Kat’s brother Geoffrey is a 37-year-old molecular pharmacologist and college professor. His commitment to his profession and academic pursuits reflects the diversity within Kat Dennings’ family.

Kat Dennings Siblings: Debbie Litwack

In the Dennings family lineup, Debbie Litwack stands out as Kat Dennings’ sister. Coming to prominence as the sister of the renowned actress, Debbie has her own identity. She gained recognition as the sibling of the star known for her roles in 2 Broke Girls and the Marvel Cinematic Universe.

As revealed by The Wiki Feed, Kat Dennings’ brother, Geoffrey S. Litwack, is a molecular pharmacologist and college professor. Dennings, being the youngest of five children, shares a strong bond with her siblings, including older brother Geoffrey S. Litwack.

Kat Dennings Family

Kat Dennings’ family is rooted in a rich cultural and professional background. Gerald J. Litwack, Kat’s father, was a distinguished pharmacologist specializing in the molecular segment. He served as a college professor and chairperson, showcasing the family’s commitment to education.

Ellen Judith Litwack, Kat Dennings’ mother, is a professional speech therapist and a well-established poet. This dynamic combination of science and art in her parents’ professions provides insight into the eclectic influences that shaped Kat Dennings.

Kat Dennings grew up in a Jewish household, adding a cultural dimension to her upbringing. The family’s residence in the haunted mansion in Wynnewood, Pennsylvania, as described by Kat in an interview, adds a touch of mystery to their history.

The Litwack family includes five children, with Kat being the youngest. In addition to Geoffrey S. Litwack, her older brother, and Debbie Litwack, her sister, Kat has other family members, including paternal side grandparents Edith J Berkman and David Lytell, and maternal side grandparents Ruth Weissman and Joel Schatz.

Moving beyond her family, Kat Dennings’ romantic life is also a subject of public interest. She is married to Andrew W.K., a singer, and their relationship began in 2021.

The couple’s first public appearance was in May, marking the beginning of a journey that led to their engagement a few months later. The ring exchange took place in May 2021, and the couple officially tied the knot in 2023.


Kat Dennings’ family is a blend of diverse talents and backgrounds, with siblings excelling in fields like molecular pharmacology and public recognition. The strong bond and shared experiences in a haunted mansion contribute to the unique narrative of the Dennings family.

Kat’s journey from a close-knit family to her own marital bliss with Andrew W.K. showcases the multifaceted aspects of her life.

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