ARR may refer to:

John Towner Williams (born February 8, 1932) is an American composer, conductor, and pianist. In a career spanning almost six decades, he has composed some of the most recognizable film scores in the history of motion pictures, including the Star Wars saga, Jaws, Superman, the Indiana Jones films, E.T. the Extra-Terrestrial, Hook, Jurassic Park, Schindler's List, War Horse, Home Alone and the first three Harry Potter films. He has had a long association with director Steven Spielberg, composing the music for all but two (Duel and The Color Purple) of Spielberg's major feature films.

Other notable works by Williams include theme music for four Olympic Games, NBC Sunday Night Football, the NBC Nightly News, the rededication of the Statue of Liberty, and the television series Lost in Space. Williams has also composed numerous classical concerti, and he served as the principal conductor of the Boston Pops Orchestra from 1980 to 1993; he is now the orchestra's conductor laureate.

Williams has won five Academy Awards, four Golden Globe Awards, seven BAFTA Awards, and 21 Grammy Awards. With 47 Academy Award nominations, Williams is the second most nominated person, after Walt Disney. John Williams was honored with the prestigious Richard Kirk award at the 1999 BMI Film and TV Awards. The award is given annually to a composer who has made significant contributions to film and television music. Williams was inducted into the Hollywood Bowl Hall of Fame in 2000, and was a recipient of the Kennedy Center Honors in 2004.

Klaus Badelt (born 12 June 1967) is an award-winning German composer, best known for composing film scores.

Badelt was born in Frankfurt, Germany. He started his musical career composing for many successful movies and commercials in his homeland. In 1998, Oscar-winning film composer Hans Zimmer invited Badelt to work at Media Ventures in Santa Monica, his studio co-owned by Jay Rifkin. Since then, Badelt has been working on a number of his own film and television projects such as The Time Machine and K-19: The Widowmaker. He also collaborated with other Media Ventures composers, such as Harry Gregson-Williams, John Powell, and Zimmer; and mentored several others like Ramin Djawadi and Steve Jablonsky.

While collaborating with Zimmer, Badelt contributed to the Oscar-nominated scores for The Thin Red Line and The Prince of Egypt, as well as writing music for many well known directors including Ridley Scott, Tony Scott, Terrence Mallick, John Woo, Kathryn Bigelow, Jeffrey Katzenberg, Werner Herzog, Sean Penn, Gore Verbinski, Michael Bay and Steven Spielberg.