Artistic director Michael Kahn will direct the comedy, to play the Lansburgh Theatre Sept. 7-Oct. 24.
The company will also include Bev Appleton as a Lord, Michael Bakkensen as Parolles, Caitlin O'Connell as Widow Capilet, Nick Depinto as Dumaine the Elder, Conrad Feininger as a Lord, Daniel Flint as the Interpreter, Adam Green as Lavatch, Natalie Mitchell as Diana, Barbara Pinolini as Rynalda and Miriana, Charity Pomeroy as the Nurse, Tony Roach as Bertram, Miriam Silverman as Helena, Ted Van Griethuysen as the King of France, Kristen Varvaris as Isabel, Danny Yeorges as Dumaine the Younger and ensemble members Kevin Hasser, Russell Jonas, John W. Schiffbauer, Scott Woltz and Kevin Woods.
The creative team includes scenic designer Court Watson, costume designer Robert Perdziola, lighting designer Charlie Morrison and composer Adam Wernick.
Mason's most recent Broadway appearance was in the play Impressionism. She recently starred in the Off-Broadway revival of I Never Sang for My Father. Her films include "Blume in Love," "The Goodbye Girl," "Only When I Laugh," "Chapter Two," "Cinderella Liberty" and more. She appeared in Broadway's The Good Doctor, Steel Magnolias, The Night of the Iguana and Happy Birthday, Wanda June.
Paxton Whitehead's numerous Broadway credits include My Fair Lady, A Little Hotel on the Side, Lettice and Lovage, Artist Descending a Staircase, Run for Your Wife, Noises Off, Camelot, The Crucifer of Blood, Habeas Corpus, Chemin de Fer, There's One in Every Marriage, Candida, Beyond the Fringe and The Affair.
For STC tickets and information, visit ShakespeareTheatre.org.