Cecile Believe (formerly known as Mozart's Sister) is a solo music project of Caila Thompson-Hannant (born February 18, 1985) who lives in Montréal, Québec. It was established in 2011. Thompson-Hannant independently released her first EP, Dear Fear, in 2011 through Bandcamp. For the two years following this release, she garnered press attention through playing festivals such as SXSW and Pop Montreal. In February 2013 she released her second EP, Hello, through Merok Records.