Susan Boyle to play self on stage
The 50-year-old, who will appear as herself during the finale of I Dreamed A Dream, said she was "thrilled" to be taking part.
Elaine C Smith, best known for starring in the BBC show Rab C Nesbitt, has been lined up to portray the singer during the rest of the show.
It will premiere at Newcastle's Theatre Royal next March before touring the UK.