Shaun Weiss is back and better ... and now he'll be returning to the big screen ... 'cause the dude's just landed a role in a movie.
The 'Mighty Ducks' star tells TMZ ... he'll be in the film, "Jesus Revolution," starring Kelsey Grammer -- based on the true story of Lonnie Frisbee and the hippies he baptized in the '70s -- and the role is reflective of his own life.
Shaun tells us, someone from Lionsgate actually saw his sobriety story and wanted to offer him the role.