Kat Stewart: Biography, Age, Husband, Children, TV Shows

There’s something quietly magnetic about actors who can slip between gritty crime dramas and warm family comedies without missing a beat. Kat Stewart is one of those performers—a familiar face to millions of Australian viewers, yet someone who has never chased the spotlight.

Born: 30 November 1972 ·
Birthplace: Bairnsdale, Victoria, Australia ·
Known for: Offspring, Five Bedrooms, Underbelly ·
Spouse: David Whiteley ·
Children: 2 (twins) ·
Award: Logie Award for Most Outstanding Actress

Eight key biographical points, one pattern: Stewart’s career is built on a mix of long-running television roles and consistent stage work—a balance that few Australian actors maintain as quietly as she does.

The table below captures the essential biographical data.

How many children does Kat Stewart have?

Kat Stewart’s children with David Whiteley

Kat Stewart and her husband David Whiteley are parents to twins. The births occurred after their marriage, though exact birth dates are not publicly shared. IMDb filmography database lists “2 (twins)” under children, and Stewart has occasionally mentioned balancing parenting with acting in interviews. The couple keeps their children’s lives largely private.

Ages and names of the twins

No public records confirm the names or precise ages of Stewart’s twins. This is one of the few personal details she has chosen not to disclose in media profiles. According to TV Guide entertainment guide, she is a mother of two, but further specifics are absent from all major databases.

Who is Kat Stewart’s husband?

David Whiteley: theatre director and partner

David Whiteley is a Melbourne-based theatre director and the husband of Kat Stewart. The couple married in February 2008, according to IMDb filmography database. Whiteley’s work in the theatre industry aligns with Stewart’s own deep ties to the stage—she is a long-time ensemble member of the Red Stitch Actors’ Theatre, where Whiteley has also directed productions.

Marriage and relationship timeline

Stewart and Whiteley have been together since before her rise to national fame. The Monash University higher education institution alumni profile references her “supportive family environment” without naming Whiteley directly, but multiple databases confirm the marriage length. The pair share twins and reside in Melbourne.

What shows has Kat Stewart been in?

Television series

Stewart’s television career spans two decades. Her most recognisable role is Billie Proudman on the AACTA Award-winning series Offspring (2010–2014, with a 2017 telemovie). She also starred in Underbelly (2008) and Five Bedrooms (2019–2023). Additional credits include Tangle and Mr & Mrs Murder, as noted by the RMK voice-over agency industry talent agency. Her screen work shows a preference for ensemble dramas and comedies.

Film appearances

Stewart has appeared in several Australian films, including Dangerous Remedy (2012) and The Little Death (2014), though her television roles dominate her filmography. IMDb filmography database lists 26 acting credits as of early 2025.

Stage productions with Red Stitch

Stewart has performed in over 15 plays with Red Stitch Actors’ Theatre in Melbourne. The company’s profile Red Stitch Actors’ Theatre official theatre company states she is “best known on television” for her Offspring role, but highlights a continuous theatre practice that distinguishes her from purely screen-based actors.

Who is the father of Kat Stewart?

Family background

Publicly available sources do not identify Kat Stewart’s father by name. Her birth registration lists Bairnsdale, Victoria, as her birthplace, but no biographical entries detail her parents. Fandango ticketing and data site provides her birth date and place but no parent information. Stewart has not discussed her father in interviews that have been widely published.

Parental information from available sources

The absence of father data is consistent across all tier 1 and tier 2 sources—Wikipedia, IMDb, TV Guide, and Red Stitch all omit parental names. This gap suggests Stewart’s father is either not a public figure or that she has chosen to keep that detail private.

What is Kat Stewart known for?

Acting career highlights

Kat Stewart is known primarily as an Australian actress, with a career that blends television, film, and theatre. Her breakthrough came with the crime drama Underbelly (2008), followed by the long-running series Offspring. The RMK voice-over agency industry talent agency profile describes her as a “household name” due to these roles. More recently, she played Heather in Five Bedrooms, a role that ran for five seasons.

Awards and recognition

Stewart’s awards include the AFI Award for Best Lead Actress in a Television Drama for Underbelly (2008), confirmed by the IMDb awards page awards aggregator. She also won the Silver Logie for Most Outstanding Actress at the 2009 Logie Awards for her role in Offspring, as listed on Wikipedia community-edited encyclopedia. Her total award count stands at 5 wins and 16 nominations according to IMDb.

Theatre contributions

Stewart is an ensemble member of Red Stitch Actors’ Theatre, earning a reputation for versatility across comedies and dramas. The Red Stitch Actors’ Theatre official theatre company profile notes she has appeared in 16 productions since joining in 2002, making her one of the company’s most experienced actors.

What the awards and roles together show: Stewart is not a one-hit-wonder but a performer who has worked steadily across media for twenty-five years, earning peer recognition along the way.

Timeline

• 30 November 1972 – Born in Bairnsdale, Victoria
• 2002 – Joined Red Stitch Actors’ Theatre as an ensemble member
• 2008 – Played key role in Underbelly; won AFI Award for Best Lead Actress in a Television Drama
• 2010 – Began portraying Billie Proudman on Offspring
• 2011 – Won Silver Logie for Most Outstanding Actress
• 2019 – First season of Five Bedrooms

Clarity: what we know vs. what we don’t

“Kat Stewart is best known on television for playing Billie Proudman in Offspring.”— Red Stitch Actors’ Theatre official theatre company profile

“Kat Stewart became a household name in Australia.”— Monash University alumni profile higher education institution

One consequence of Stewart’s quiet career management: the public knows her work but little of her private life. For Australian viewers, the roles she chooses—from Underbelly‘s raw crime to Five Bedrooms‘ gentle comedy—are the only reliable portrait. The decision to keep her father, net worth, and family details private may frustrate fans, but it also reinforces her focus on craft over celebrity. For any media outlet writing the next profile, the gaps are as instructive as the facts: Stewart controls what leaks.