Dario Marianelli (born 21 June 1963) is an Italian composer.

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Marianelli was born in Pisa, Italy. He studied piano and composition in Florence and London. After a year as a postgraduate composer at the Guildhall School of Music, he took up a three-year postgraduate program at the National Film and Television School in London, from which he graduated in 1997. While there, he also undertook diverse projects, composing for concerts, contemporary ballet and theatre productions.

Marianelli had already written scores for several films and TV projects, including movies such as Ailsa and Pandaemonium, when director Joe Wright contacted him about scoring his 2005 film Pride & Prejudice.^[1] He subsequently composed for Wright's films Atonement, The Soloist, Anna Karenina and Darkest Hour.^[2]

In 2008 Marianelli won the Academy Award for Original Music Score and Golden Globe Award for Best Original Score for Atonement. He has also been nominated for Academy Awards for Pride & Prejudice and Anna Karenina.

In 2018 he composed the score for Bumblebee, the sixth installment in the Transformers film series. It was his second score for director Travis Knight, after Kubo and the Two Strings.

Marianelli has continued to write concert, theatre and ballet music.

• Broadcast Film Critics Association Award for Best Composer
• Chicago Film Critics Association