Katharine returns to FST after appearing in last year's Write A Play program. She is a recent graduate of Vassar College, where she studied psychology, literature, and drama.  Favorite Vassar roles include Tilly (The Melancholy Play), Zillah (A Bright Room Called Day), and Lady Macbeth (Macbeth).  Following graduation, Katharine spent two summers at the critically acclaimed Hudson Valley Shakespeare Festival where she appeared as Lychorida in Pericles and Perdita in The Winter's Tale.  This past spring she played Portia in Shakespeare & Co.'s tour of Julius Caesar, and this September she tackles Desdemona for Tennessee Shakespeare Co.'s production of Othello.

Most recently Warren starred as George Bernard Shaw in the Off Broadway/NY Premiere of Engaging Shaw [New York Times Critic’s Pick]. Having appeared in more than 175 productions to date, Warren’s extremely busy career on the regional circuit includes work at Actors Theatre of Louisville, Walnut St. Theatre, Goodspeed, Florida Stage, The Fulton, Orlando Shakespeare, Pioneer Theatre Co., Riverside Theatre, and Cape Playhouse.  In recent seasons he has played leading roles in The Foreigner, A Little Night Music, Present Laughter, Opus, The Comedy of Errors, Moonlight and Magnolias, Dinner with Friends, The Full Monty, Sleuth, and Boeing-Boeing. Awards and nominations: NY Innovative Theatre Award, Florida’s Carbonell, Cincinnati Acclaim Award, and Connecticut Critics Circle.

FST: Opus, Permanent Collection, Pure Confidence, The Gambol of Love. NEW YORK: The Cherry Lane Theatre, Manhattan Theatre Source, The Algonquin Theatre, Broad Horizons. Jeffrey played Greg in over 250 performances of The Sum of Us. REGIONAL: Syracuse Stage, Cincinnati Playhouse, Capitol Rep, Pennsylvania Stage, Three Rivers' Shakespeare Festival, Chicago's Body Politic, Pennsylvania Centre Stage, GeVA, Fairfield Theatre Company, South Jersey Regional Theatre, and The Metro Lyric Opera. TV: All My Children, Deadline. FILM: Millennium Crisis, FireFly, Solar Vengeance, Alien Uprising. 

Broadway: Tony Award-winning Nine, A Chorus Line, Royal Family (with Rosemary Harris). Tours: Tale of the Allergist's Wife (with Valerie Harper). Off Broadway: Marsha Norman's Last Dance (with Jo Beth Williams), John Patrick Shanley's Defiance, Charles Busch's Our Leading Lady. NY Classical Theatre: Misalliance, Hamlet. Florida Studio Theatre: Always Patsy Cline. Dreamcatcher Theatre: As Bees in Honey Drown (Best Actress, NJ Theatre Critics) And the World Goes Round (Best Featured Actress, NJ Theatre Critics). Premier Stages: Humbug (first female Scrooge). Catch Me If You Can (with Jamie Farr, Gretna Playhouse). Clifford Odet's The Big Knife (with Robert Beltran and Miguel Sandoval, Lillian Theatre). She has also performed with Marion Ross, Burt