Simone Butler has joined the band as a full-time member, replacing Mani, who quit to rejoin The Stone Roses last year.
No further details about Butler were released by the band's representatives, aside from a picture attached to the announcement.
My Bloody Valentine's Debbie Googe was previously filling in for Mani, but she was never hired as a permanent replacement.
Speaking of Mani's departure earlier this year, Bobby Gillespie said: "Mani has left the band - that's the situation. He has gone and joined The Stone Roses. That's cool.
"He had been wanting to do it for years. I'll go and see them live - The Stones Roses are a f**king great band."
Primal Scream are planning to release a new album in early 2013.
Watch Primal Scream's video for 'Country Girl' below: