Theory of a Deadman will be the final act for MontanaFair this year.
Ray Massie of MetraPark, said the fair has a lot of variety as they join the line up with Jason Durelo, Gabriel Iglesias, and 3 Doors Down.
"One of the things we want to do was make sure people get value for the money spent, and that's why we went and got an act like Theory of a Deadman to open for 3 Doors Down" said Massie.
You can catch Theory of a Deadman August 14th.
Tickets go on sale this Friday.