Ensemble Studio Theatre

EST also cultivates the development of plays during a three-week annual tenure as the resident theater company of the Southampton Writers Conference, in partnership with the SUNY Stony Brook's MFA summer playwriting program.

The Marathon has been credited for reviving the one-act play form, inspiring many similar festivals across the country.

Past playwrights include Horton Foote, Tina Howe, David Mamet, Shirley Lauro, Jaquelyn Reingold, and José Rivera.

EST has a membership of over 600 theatre artists, including playwrights, directors, actors, designers and managers.

Plays by current and former Youngblood playwrights have been performed at The Royal Court Theatre, Lincoln Center, Playwrights Horizons, Second Stage, Actors Theatre of Louisville, the Mark Taper Forum, the Vineyard Theater, the Atlantic Theater Company and Rattlestick Playwrights Theater, including award winners such as Annie Baker's The Aliens and Amy Herzog's 4000 Miles, and have been adapted by film and television companies, including alumni Lucy Alibar's Juicy and Delicious which was adapted into the film Beasts of The Southern Wild.