Leonardo Wilhelm DiCaprio (/dɨˈkæpri.oʊ/; born November 11, 1974) is an American actor and film producer. He has been nominated for the Golden Globe Award eight times as an actor, and won the Golden Globe Award for Best Actor for his performance in The Aviator (2004). He has also been nominated by the Academy Awards, Screen Actors Guild, Satellite Awards, and the British Academy of Film and Television Arts.

Born and raised in Los Angeles, California, DiCaprio started his career by appearing in television commercials prior to landing recurring roles in TV series such as the soap opera Santa Barbara and the sitcom Growing Pains in the early 1990s. He made his film debut in the comedic sci-fi horror film Critters 3 (1991) and received first notable critical praise for his performance in This Boy's Life (1993). DiCaprio obtained recognition for his subsequent work in supporting roles in What's Eating Gilbert Grape (1993) and Marvin's Room (1996), as well as leading roles in The Basketball Diaries (1995) and Romeo + Juliet (1996), before achieving international fame in James Cameron's Titanic (1997).

Kevin Spacey, CBE (born Kevin Spacey Fowler; July 26, 1959) is an American actor, director, screenwriter, producer, and crooner. He grew up in California, and began his career as a stage actor during the 1980s, before being cast in supporting roles in film and television. He gained critical acclaim in the early 1990s, culminating in his first Academy Award for The Usual Suspects (Best Supporting Actor), followed by a Best Actor Academy Award win for American Beauty (1999). His other starring roles in Hollywood include Seven, L.A. Confidential, Pay It Forward, K-PAX, and Superman Returns in a career which has earned him several Emmy and Golden Globe nominations. Since 2003, he has been artistic director of the Old Vic theatre in London.

Spacey was born in South Orange, New Jersey, the son of Kathleen Ann (née Knutson; December 5, 1931 – March 19, 2003), a secretary, and Thomas Geoffrey Fowler (June 4, 1924 – December 24, 1992), a technical writer and data consultant. He has two older siblings: a sister, Julie, and a brother, Randy. He attended Northridge Military Academy, Canoga Park High School (in tenth and eleventh grades), and then Chatsworth High School in Chatsworth, Los Angeles, where he graduated valedictorian of his class. At Chatsworth High, he starred in the school's senior production of The Sound of Music, playing the part of Captain Georg von Trapp, opposite Mare Winningham's character, Maria.

Heath Andrew Ledger (4 April 1979 – 22 January 2008) was an Australian television and film actor. After performing roles in Australian television and film during the 1990s, Ledger left his homeland for the United States in 1998 to develop his film career. His work comprised nineteen films, including 10 Things I Hate About You (1999), The Patriot (2000), A Knight's Tale (2001), Brokeback Mountain (2005), and The Dark Knight (2008). In addition to acting, he produced and directed music videos and aspired to be a film director.

For his portrayal of Ennis Del Mar in Brokeback Mountain, Ledger won the 2005 New York Film Critics Circle Award for Best Actor and the 2006 "Best Actor" award from the Australian Film Institute and was nominated for the 2005 Academy Award for Best Actor as well as the 2006 BAFTA Award for Best Actor in a Leading Role. Posthumously he shared the 2007 Independent Spirit Robert Altman Award with the rest of the ensemble cast, the director, and the casting director for the film I'm Not There, which was inspired by the life and songs of American singer-songwriter Bob Dylan. In the film, Ledger portrayed a fictional actor named Robbie Clark, one of six characters embodying aspects of Dylan's life and persona. Ledger received numerous accolades for his critically acclaimed portrayal of the Joker in The Dark Knight, including the Academy Award for Best Supporting Actor, a Best Actor International Award at the 2008 Australian Film Institute Awards, for which he became the first actor to win an award posthumously, the 2008 Los Angeles Film Critics Association Award for Best Supporting Actor, the 2009 Golden Globe Award for Best Supporting Actor and the 2009 BAFTA Award for Best Supporting Actor.