Theme music is a piece that is often written specifically for a radio program, television program, video game or movie, and usually played during the title sequence and/or end credits. If it is accompanied by lyrics, most often associated with the show, it is a theme song.

The phrase theme song or signature tune may also be used to refer to a song that has become especially associated with a particular performer or dignitary; often used as they make an entrance.

The purpose of a theme song is often similar to that of a leitmotif.

The purpose of the music is to establish a mood for the show and to provide an audible cue that a particular show is beginning, which was especially useful in the early days of radio (See also interval signal). In some cases, including The Brady Bunch, Gilligan's Island, The Fresh Prince of Bel-Air, Land of the Lost, The Nanny and The Beverly Hillbillies the lyrics of the theme song provide some necessary exposition for people unfamiliar with the show.

In addition, some theme music uses orchestra scores or original music set mood for the show. One example of these is the Batman: The Animated Series theme song, which was drawn from the theme for the 1989 Batman film created by Danny Elfman and sets the mood for cartoon. Others uses remixes or covers of older songs, such as the theme song of Spider-Man: The Animated Series (1994-1998), which featured a reworked cover of the theme song from the classic Spider-Man cartoon from the 1960s. The song was performed by Aerosmith lead guitarist Joe Perry.

Lindsey Stirling (born on September 21, 1986) is an American violinist, musician, dancer, performance artist, and composer. In 2010 she competed on the fifth season of America's Got Talent. Stirling is noted for her versatility performing music from country to hip hop.

At the age of 23 Stirling was a quarter-finalist on the fifth season of America's Got Talent where she was known as the ‘Hip Hop Violinist’. After Stirling's performance, Sharon Osbourne said, "Wow... we love you Lindsey!” and Piers Morgan called her performance "Electrifying!".

At the age of 5, after being influenced by the classic music records played by her father, Stirling requested the opportunity to learn and play the violin.

Stirling was classically trained through private lessons for 12 years. When she was 16, she joined a rock band with four friends called Stomp on Melvin. As part of her experience with Stomp on Melvin, Stirling wrote a solo violin rock song, and her performance helped her to win both the title of Arizona’s Jr. Miss in 2005 and the talent category of the National Jr. Miss Pageant. As of May 2, 2012, Stirling is 5'3" tall.

James Roy Horner (born August 14, 1953) is an American composer, orchestrator, and conductor of orchestral and film music. He is noted for the integration of choral and electronic elements in many of his film scores, and for frequent use of Celtic musical elements. His score to the 1997 film Titanic remains the best selling orchestral film soundtrack of all time.

In addition, Horner has scored over 100 films, frequently collaborating with acclaimed directors such as James Cameron and Ron Howard. Some of his most noteworthy works include Star Trek II: The Wrath of Khan (1982), Star Trek III: The Search for Spock (1984), Cocoon (1985), An American Tail (1986), Aliens (1986), The Land Before Time (1988), Willow (1988), Glory (1989), Field of Dreams (1989), The Rocketeer (1991), Legends of the Fall (1994), Apollo 13 (1995), Braveheart (1995), The Mask of Zorro (1998), A Beautiful Mind (2001), Troy (2004), and Avatar (2009).

Horner has won two Academy Awards, two Golden Globe Awards, three Satellite Awards, three Saturn Awards, and has been nominated for three BAFTA Awards. His body of work is also notable for including the scores to the two highest-grossing films of all time; Titanic (1997) and Avatar (2009), both of which were directed by James Cameron.

Dr. Henry Walton "Indiana" Jones, Jr. is a fictional character and the protagonist of the Indiana Jones franchise. George Lucas and Steven Spielberg created the character in homage to the action heroes of 1930s film serials. The character first appeared in the 1981 film Raiders of the Lost Ark, to be followed by Indiana Jones and the Temple of Doom in 1984, Indiana Jones and the Last Crusade in 1989, The Young Indiana Jones Chronicles from 1992 to 1996, and Indiana Jones and the Kingdom of the Crystal Skull in 2008. Alongside the more widely known films and television programs, the character is also featured in novels, comics, video games, and other media. Jones is also featured in the theme park attraction Indiana Jones Adventure, which exists in similar forms at Disneyland and Tokyo DisneySea.

Jones is most famously played by Harrison Ford and has also been portrayed by River Phoenix (as the young Jones in The Last Crusade), and in the television series The Young Indiana Jones Chronicles by Corey Carrier, Sean Patrick Flanery, and George Hall. Doug Lee has supplied Jones's voice to two LucasArts video games, Indiana Jones and the Fate of Atlantis and Indiana Jones and the Infernal Machine, while David Esch supplied his voice to Indiana Jones and the Emperor's Tomb and John Armstrong in Indiana Jones and the Staff of Kings.

Peter Hollens is an American pop singer-songwriter-producer. He has been heavily involved with a cappella music since 1999 when he co-founded (with Leo da Silva) the University of Oregon's award-winning a cappella group On The Rocks, known as the first official collegiate a cappella group in Oregon. On The Rocks began a tradition of excellence in a genre that was previously unheard of in the Northwest. Originally from Ashland, Oregon, Peter graduated from the University of Oregon with a Bachelor of Music in Vocal performance. Since his graduation from the U of O, he has become very involved with collegiate a cappella, including recording, producing & judging international a cappella competitions throughout the United States. In 2010, Peter was featured on NBC’s The Sing Off receiving acclaim from The Sing-Off judges Shawn Stockman, Nicole Scherzinger and Ben Folds for solo performances leading On the Rocks, one of America’s premier collegiate a cappella groups. Peter records and produces from his home studio in Eugene, Oregon and recently recorded for Sony and Epic Records. Peter is married to Evynne Hollens, founder of the a cappella group Divisi.