Sister Bliss (real name Ayalah Bentovim, Hebrew אילה בן-טובים - born December 30, 1970) is a British musician, producer and DJ. In the studio she is best known for her work with Rollo Armstrong creating and remixing hits by a number of artists.

She started music at the age of five, when she learned how to play the piano. She eventually moved on to the violin, saxophone and then bass.She is also a member of "Faithless" which she formed in 1995 with Rollo, Jamie Catto and Maxi Jazz.

Various others have been members and collaborators over the years including Zoë Johnston and, frequently, Dido Armstrong who is Rollo's sister and began her music career providing backing vocals for the band.

Faithless tour extensively and while Rollo prefers to stay in the studio, Sister Bliss can be seen on stage with Maxi.On 10 September 2006 she gave birth to a baby boy.