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).

Kate Elizabeth Winslet (born 5 October 1975) is an English actress. She was the youngest person to accrue six Academy Award nominations, and won the Academy Award for Best Actress for The Reader (2008). She has won awards from the Screen Actors Guild, British Academy of Film and Television Arts, and the Hollywood Foreign Press Association among others, and has been nominated twice for an Emmy Award for television acting, winning once for her role as Mildred Pierce in the 2011 mini-series of the same name.

Brought up in Berkshire, Winslet studied drama from childhood, and began her career in British television in 1991. She made her film debut in Heavenly Creatures (1994), for which she received her first notable critical praise. She achieved recognition for her subsequent work in a supporting role in Sense and Sensibility (1995) and for her leading role in Titanic (1997), the highest grossing film at the time, and the highest grossing film of Winslet's career.

Since 2000, Winslet's performances have continued to draw positive comments from film critics, and she has been nominated for various awards for her work in such films as Quills (2000), Iris (2001), Eternal Sunshine of the Spotless Mind (2004), Finding Neverland (2004), Little Children (2006), The Reader (2008) and Revolutionary Road (2008). Her performance in the last of these prompted New York magazine critic David Edelstein to describe her as "the best English-speaking film actress of her generation". The romantic comedy The Holiday and the animated film Flushed Away (both 2006) are among the biggest commercial successes of her career.

Stefani Joanne Angelina Germanotta (/ˈstɛfəniː dʒʌrməˈnɑːtə/ STE-fə-nee jurr-mə-NAH-tə; born March 28, 1986), known by her stage name Lady Gaga, is an American singer and songwriter. Born and raised in New York City, she primarily studied at the Convent of the Sacred Heart and briefly attended New York University's Tisch School of the Arts before withdrawing to focus on her musical career. She began performing in the rock music scene of Manhattan's Lower East Side, and was signed with Streamline Records by the end of 2007. During her employment as a songwriter for the record company, her vocal abilities captured the attention of recording artist Akon, who signed her to his label Kon Live Distribution.

Lady Gaga came to prominence as a recording artist following the release of her debut album The Fame (2008), which was a critical and commercial success that topped charts around the world and included the international number-one singles "Just Dance" and "Poker Face". After embarking on the The Fame Ball Tour, she followed the album with The Fame Monster (2009), which spawned the worldwide hit singles "Bad Romance", "Telephone" and "Alejandro". The album's success allowed her to embark on the eighteen-month long Monster Ball Tour, which later became one of the highest-grossing concert tours of all time. Her most recent album Born This Way (2011) topped the charts of most major markets and generated more international chart-topping singles, including "Born This Way", "Judas" and "The Edge of Glory". Besides her musical career, she involves herself with humanitarian causes and LGBT activism.