Moustache was born in The Seychelles, and had studied acting and directing in the United Kingdom. He moved to Norway in the 1980s, becoming the director of a theatre group Artists for Libertation.
Moustache has noted that, in the 1990s, 'theatre in Oslo was not promoting the wealth and dynamism of multiculturalism'. There were little professional opportunities for Black actors, with some Norwegian theatres still using make-up so white actos could play Black roles.