Lindsay Armaou (Greek: Λίντσεϊ Αρμάου; born 18 December 1978) is a Greek-born Irish actress and singer.

She is best known as a member of girl group B*Witched and for her roles as Sister Georgina in the crime thriller film The Smoke (2014) and Marlene Flynn in the Netflix drama Stay Close (2021).

Upon a friend Graham's suggestion, they asked Armaou to come for an audition and she played a tape recording of a song called "United We Stand" that she had written.

In April 2012, Lindsay was cast in her first feature film role as Sister Georgina in the British indie crime thriller Two Days in the Smoke, alongside Matt Di Angelo, Stephen Marcus and Alan Ford.

On 18 October 2012, it was announced that the original members of B*Witched would reunite for an ITV2 series entitled The Big Reunion along with five other pop groups of their time: 911, Liberty X, Five, Honeyz and Atomic Kitten.