Micaela Rachel "Mica" Levi (born February 1987), also known by their stage name Micachu, is an English musician, composer, producer, singer, and songwriter.

Levi studied composition at the Guildhall School of Music and Drama, but left without a degree when their experimental pop band Micachu and the Shapes began to achieve early success. Their debut album Jewellery (2009) received enthusiastic reviews and was followed by several more studio albums, with the group changing their name to Good Sad Happy Bad in 2016. Levi has also released solo projects under both the Micachu moniker and their given name, and has frequently collaborated with other artists, including Kwes and Tirzah.

In the early 2010s, Levi made their debut as a film composer, creating the widely praised score for Jonathan Glazer's film Under the Skin (2013). Levi received a European Film Award for Best Composer and a BAFTA Award for Best Film Music nomination, and won multiple other awards for this first movie composition. Levi then collaborated again with Glazer on his next film, the acclaimed The Zone of Interest (2023) (for which they won the Soundtrack Award at the 2023 Cannes Film Festival), and two short films. In 2017, Levi received their first Academy Awards nomination for Pablo Larraín's Jackie (2016). They also worked with director Steve McQueen on his Small Axe anthology film series.