Celebrities who are 40 years old

Katheryn Elizabeth Hudson (born October 25, 1984), known professionally as Katy Perry, is an American singer, songwriter and television personality. She is known for her influence on modern pop music and her camp style, being dubbed the "Queen of Camp" by Vogue and Rolling Stone. At 16, Perry released a gospel record titled Katy Hudson (2001) under Red Hill Records, which was commercially unsuccessful. She moved to Los Angeles at 17 to venture into secular music, and later adopted the stage name "Katy Perry" from her mother's maiden name. She recorded an album while signed to Columbia Records, but was dropped before signing to Capitol Records.

Beren Saat (born 26 February 1984) is a Turkish actress born and raised in Ankara. Since the beginning of her career, she has received critical acclaim and numerous accolades for her acting. While studying at Başkent University, she participated in the acting competition Türkiye'nin Yıldızları and was discovered by Turkish director Tomris Giritlioğlu, launching her professional acting career.

Khloé Alexandra Kardashian (born June 27, 1984) is an American media personality, socialite, and model. Since 2007, she has starred with her family in the reality television series Keeping Up with the Kardashians. Its success has led to the creation of spin-offs, including Kourtney and Khloé Take Miami (2009–2013) and Kourtney and Khloé Take The Hamptons (2014–2015).

Marian Rivera Gracia-Dantes (Fil) or Marian Rivera Gracia de Dantes (Es) (née Spanish: Marian Gracia y Rivera; Filipino: Marian Rivera Gracia; born 12 August 1984) is a Spanish-Filipino commercial model and actress, best known for her roles in MariMar, Dyesebel, Amaya, and Temptation of Wife.

Adam Richard Wiles (born 17 January 1984), known professionally as Calvin Harris, is a Scottish DJ, record producer, singer, and songwriter. He is known for his singles "We Found Love", "This Is What You Came For", "Summer", "Feel So Close", "Outside", "Feels", and "One Kiss". His collaboration with Rihanna, "We Found Love", became an international success, giving Harris his first number one single on the US Billboard Hot 100. He has released five studio albums and runs his own record label, Fly Eye Records, which he founded in 2010.

Olivia Jane Cockburn ( KOH-bərn; born March 10, 1984), known professionally as Olivia Wilde, is an American actress and filmmaker. She played Remy "Thirteen" Hadley on the medical-drama television series House (2007–2012), and has appeared in the films Tron: Legacy (2010), Cowboys & Aliens (2011), The Incredible Burt Wonderstone (2013), and The Lazarus Effect (2015). Wilde made her Broadway debut in 2017, playing Julia in 1984. In 2019, she directed her first film, the teen comedy Booksmart, for which she won the Independent Spirit Award for Best First Feature. Wilde's second feature as director, Don't Worry Darling, was released in 2022.

Lucy Katherine Pinder (born 20 December 1983) is a British model and actress. She rose to international fame for her work as a glamour model in men's magazines, and made her film debut in the comedy horror Strippers vs Werewolves (2012), which was followed by supporting roles in several films.

Avril Ramona Lavigne ( AV-ril lə-VEEN; born September 27, 1984) is a Canadian singer and songwriter. She is considered a key musician in the development of pop-punk music, as she paved the way for female-driven, punk-influenced pop music in the early 2000s. Her accolades include eight Grammy Awards nominations, among others.

Nayvadius DeMun Wilburn (born November 20, 1983), known professionally as Future, is an American rapper, singer, songwriter, and record producer. Born and raised in Atlanta, Georgia, he first became involved in music as part of the Dungeon Family collective, where he was nicknamed "the Future". After amassing a series of mixtapes between 2010 and 2011, Future signed a major record label deal with Epic Records and Rocko's A1 Recordings, which helped launch Future's own label imprint, Freebandz. He subsequently released his debut album, Pluto, in April 2012 to positive reviews. Future's second album, Honest, was released in April 2014, surpassing his debut on the album charts.

Taylor Jane Schilling (born July 27, 1984) is an American actress. She is known for her role as Piper Chapman on the Netflix original comedy-drama series Orange Is the New Black (2013–2019), for which she received a nomination for the Primetime Emmy Award for Outstanding Lead Actress in a Comedy Series and two Golden Globe Award nominations for Best Actress – Television Series Musical or Comedy and Best Actress – Television Series Drama. She made her film debut in the 2007 drama Dark Matter. Schilling also starred as Nurse Veronica Flanagan Callahan in the short-lived NBC medical drama Mercy (2009–10). Her other films include Atlas Shrugged: Part I (2011), the romantic drama The Lucky One (2012), the comedy Take Me (2017) and the science fiction thriller The Titan (2018).