<Li> Madeline Carroll as Shannon, Bart's girlfriend <Ul> <Li> Taegen Burns as Young Shannon </Li> </Ul> </Li> <Ul> <Li> Taegen Burns as Young Shannon </Li> </Ul> <Li> Taegen Burns as Young Shannon </Li> <Li> Trace Adkins as Scott Brickell, MercyMe's manager </Li>

Who does the singing in i can only imagine