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Kaley Cuoco Biography: The Big Bang Theory Star Turned Producer

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Kaley Cuoco headshot

Kaley Cuoco Biography: The Big Bang Theory Star Turned Producer

Kaley Cuoco is an American actress and producer best known for playing Penny on CBS’s The Big Bang Theory (2007–2019). A child actress turned $1-million-per-episode star, she later starred in and executive-produced HBO Max’s The Flight Attendant, earning Primetime Emmy and Golden Globe nominations. In October 2026, Cuoco welcomed her second daughter with her fiancé, actor Tom Pelphrey.

Quick facts: Kaley Cuoco

  • Full name: Kaley Cuoco
  • Born: November 30, 1985, Camarillo, California, USA
  • Nationality: American
  • Occupation: Actress, producer
  • Known for: Penny on The Big Bang Theory; The Flight Attendant
  • Partner: Tom Pelphrey (engaged since August 2024)
  • Children: Matilda (born March 2023), Philomena (born October 2026)
  • Estimated net worth: ~$110 million (2026 estimate)

Kaley Cuoco’s early life and background

Kaley Cuoco was born on November 30, 1985, in Camarillo, California. As a child she was a ranked amateur tennis player, taking up the sport at age three before quitting at 16 to pursue acting full-time. She began acting young, appearing in the TV film Quicksand: No Escape (1992) and the feature film Virtuosity (1995) opposite Denzel Washington. Her younger sister Briana is an actress and singer who later appeared alongside her in The Flight Attendant.

Career: from child actress to sitcom stardom

Cuoco’s breakthrough came in 2002, when she was cast as Bridget Hennessy on ABC’s sitcom 8 Simple Rules, which ran until 2005. She then joined the final season of Charmed (2005–2006) as Billie Jenkins and voiced Brandy Harrington on Disney’s animated Brandy & Mr. Whiskers (2004–2006).

In 2007 she landed the role that would define her career: Penny, the aspiring-actress neighbor on CBS’s The Big Bang Theory. The sitcom ran for 12 seasons until 2019, becoming one of television’s most successful comedies. Cuoco’s salary grew from $60,000 per episode in the early seasons to a reported $1 million per episode from season 8 onward — a deal that, per Forbes, made her the joint highest-paid television actress in the world in 2015 alongside Sofía Vergara, with $28.5 million in earnings that year. Forbes listed her again in 2016 with $24.5 million in earnings.

After The Big Bang Theory ended, Cuoco reinvented herself as a producer-performer. In October 2017 she founded her own company, Yes, Norman Productions (named for her late dog Norman), and its first project was The Flight Attendant, the HBO Max comedy-thriller in which she starred as Cassie Bowden and served as executive producer from 2020 to 2022. The role brought her Primetime Emmy nominations in 2021 and 2022, plus Golden Globe, SAG and Critics’ Choice nominations. Since 2019 she has also voiced the title character in Max’s animated series Harley Quinn, where she is also an executive producer. She later starred as Ava Bartlett in Peacock’s Based on a True Story (2023–2024) and in the films The Man from Toronto, Meet Cute (both 2022) and Role Play (2024).

Achievements and awards

For The Big Bang Theory, Cuoco won a Satellite Award, a Critics’ Choice Award and two People’s Choice Awards, and she received a star on the Hollywood Walk of Fame in 2014. The Flight Attendant brought her two Primetime Emmy nominations and Golden Globe, Screen Actors Guild and Critics’ Choice nominations, cementing her standing as one of television’s few sitcom stars to successfully reinvent themselves as dramatic leads and producers.

Personal life

Cuoco married tennis player Ryan Sweeting in December 2013; the couple divorced in 2016. She then married equestrian Karl Cook in June 2018; they announced their separation in September 2021. Since 2022 she has been in a relationship with actor Tom Pelphrey — known for Ozark and Banshee — and the couple announced their engagement in August 2024. Their first daughter, Matilda, was born in March 2023.

On October 14, 2026, Cuoco announced via Instagram that the couple had welcomed their second daughter, Philomena Carmine Bobby Pelphrey, born October 12. Sharing hospital photos, she wrote that the family was “officially complete.” Pelphrey had spoken about the pregnancy at the September 2026 Emmy Awards, where he won Outstanding Supporting Actor in a Drama Series for HBO’s Task.

Beyond acting, Cuoco is a passionate equestrian and animal-welfare advocate. She launched the pet-care brand Oh, Norman! in 2023, named after her late pit bull mix.

Net worth snapshot

Kaley Cuoco’s net worth is estimated at around $110 million as of 2026, built on her Big Bang Theory salary peak of $1 million per episode, backend syndication income, endorsements and real estate. For the full breakdown — including her Forbes earnings years and property deals — read Kaley Cuoco’s net worth.

Frequently asked questions about Kaley Cuoco

What is Kaley Cuoco known for?

Kaley Cuoco is best known for playing Penny on CBS’s The Big Bang Theory (2007-2019), one of the most successful sitcoms in television history. She later starred in and executive-produced HBO Max’s The Flight Attendant, earning Primetime Emmy and Golden Globe nominations, and has voiced Harley Quinn in Max’s animated series since 2019.

Who is Kaley Cuoco engaged to?

Kaley Cuoco is engaged to actor Tom Pelphrey, known for Ozark, Banshee and HBO’s Task. The couple announced their engagement in August 2024. Pelphrey won the 2026 Emmy for Outstanding Supporting Actor in a Drama Series.

How many children does Kaley Cuoco have?

Kaley Cuoco has two daughters with her fiance Tom Pelphrey: Matilda, born in March 2023, and Philomena Carmine Bobby Pelphrey, born October 12, 2026 and announced via Instagram on October 14, 2026.

What is Kaley Cuoco’s net worth?

Kaley Cuoco’s net worth is estimated at about $110 million as of 2026, per Celebrity Net Worth (via Parade, September 2026). Her fortune comes mainly from her Big Bang Theory earnings – including a reported $1 million per episode in the later seasons – plus endorsements, producing income and real estate. No Forbes or Bloomberg figure has been published.

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