The film Last Exorcism was first shown at the Sundance Film Festival before February 2010 .
The film premiered on January 25 , 2010 as part of the Sundance Film Festival and was part of the South by Southwest Film Festival 2010.Possession at Full Mass in New Hi-Res 'Last Exorcism ' Images On February 12 , 2010 , Lionsgate saved the rights