Comics and manga

• Secret, the 2012–2014 comic series by Jonathan Hickman and Ryan Bodenheim
• Secret, the 2013 manga series sequel to the Doubt series, by Yoshiki Tonogai
• The Secret (Dark Horse Comics), a 2007 limited series comic book

Fictional entities

• Secret (Greta Hayes), a fictional superhero
• The Secret, the MacGuffin in the 2007 The Secret Series by Pseudonymous Bosch

Films

• A Secret, a 2007 French drama by Claude Miller
• Secret (2007 film), a Taiwanese romance by Jay Chou
• Secret (2009 film), a South Korean thriller by Yoon Jae-goo
• Secrets (1992 American film), an American made-for-television drama film directed by Peter H. Hunt
• Secrets (1992 Australian film), an Australian film
• The Secret (1955 film), a British film by Cy Endfield
• The Secret (1974 film), a French thriller by Robert Enrico
• The Secret (1979 film), a Hong Kong film by Ann Hui
• The Secret, a 1988 Venezuelan film by Luis Armando Roche
• The Secret (1990 film), an Italian film by Francesco Maselli
• The Secret (1992 film), an American made-for-TV film by Karen Arthur
• The Secret (2001 film), a French film by Virginie Wagon
• The Secret (2006 film), a self-help film by Drew Heriot
• The Secret (2007 film), a French thriller by Vincent Perez
• Dead Time: Kala, also known as The Secret, a 2007 Indonesian neo-noir thriller by Joko Anwar
• The Secret (2016 film), a Chinese film by Wong Chun-chun
• The Secret: Dare to Dream (2020 film), an American film directed by Andy Tennant

Literature

• The Secret, an 1833 juvenile story by Charlotte Brontë
• The Secret, a 1950 novel by Mary Roberts Rinehart
• "The Secret" (short story), a 1963 short story by Arthur C. Clarke
• The Secret (treasure hunt), a 1982 treasure hunt and puzzle book by Byron Preiss
• The Secret (novel), a 1997 book in the Animorphs series
• The Secret: A Novel, a 2002 novel by Eva Hoffman
• The Secret (Byrne book), a 2006 self-help book by Rhonda Byrne
• The Secret, a 2016 novel by Kathryn Hughes
• The Secret, a 2023 novel by Lee Child

Music

Television