Mariam Karolina Riahi Wallentin (born 28 July 1982 in Örebro, Sweden)[1] is a Swedish musician (vocals, percussion, composer) and voice actress.
Wallentin first sang in the local soul band Carnival, with which she released an EP in 1999.
From 2006 she studied at the Högskolan för scen och musik (Academy of Music and Drama) in Gothenburg.
[2] Since 2013 she is also on tour with the experimental solo project Mariam the Believer, which released their first album Blood Donation, in the same year.
She is also a musician on Gothenburg String Theory, David Åhlen, Susanna & The Magical Orchestra, Lykke Li and with Lisa Ullén and Nina de Heney as Nuiversum.