Mark Arnold
— Mr. Henderson (Acting Teacher London)
Marah Fairclough
— Natalie
Emma Maddock
— Claire (Celeste's classmate)
Timothy Landfield
— Mr. Park (Acting Teacher Los Angeles)
Corinne Delacour
— Casting Director (as Corinne Mitchell)
Francesco Gabriele
— Alessandro De Angelis
Kate Milner Evans
— Casting Director
Helen Watkinson
— Celeste Barnes
Hollis Doherty
— Agent Mary Brown