We see:
- Orson Welles, played by Christian McKay ("Abraham's Point") who is a Welles impressionist, not a Welles impersonator.
- John Housemen, played by Eddie Marsan ("The Illusionist") who shows us the endless patience it took to work with Welles.
- George Courlouris, played by Ben Chaplin ("Stage Beauty"), as he shakily tackles the challenging role of Mark Antony.
- Muriel Brassler, played by Kelly Reilly ("Mrs. Henderson Presents"), who worries that her Portia will be upstaged by Welles' Brutus.
- Joseph Cotton, played by James Tupper (LOTS of TV), who is Publius in this legendary production.
- Gretta Adler, a fictitious character played by Zoe Kazan ("It's Complicated"), a young woman whose goal is to publish an article in the New Yorker magazine.
- Sonja Jones, probably fictitious, ambitious and worldly as played by Claire Danes ("Shopgirl"), she helps our hero (see below) learn about the big, bad city.
- Richard Samuels, another probable fiction, played by Zac Efron ("17 Again"), a high school student who samples life upon the wicked stage.
I spent most of my time trying to identify who each actor portrays, as the topic of the Mercury is a fascinating one for a person who loves theatre. The story itself seems to be a vehicle for Efron, although all the actors do a commendable job. I could only pity anyone who had the honor/ horror of working with Welles...