Denise Gough, Indhu Rubasingham and Simon Stephens have been confirmed as judges for the inaugural Phil Fox Award for Playwriting.
They will join the previously announced Enda Walsh on the panel, which will be hosted by Outside Edge Theatre company.
Playwright and company theatre associate Sonya Hale, Nick Hern Books managing director Matt Applewhite and Barbara Broccoli have also been announced as judges.
The competition, which invites UK playwrights to submit scripts relating to substance misuse and addiction, will be funded by the Carne Trust.
OETC artistic director Matt Steinberg said: “I am beyond thrilled that such an incredible group of judges has agreed to join us for our inaugural script competition.
“OETC’s ethos and belief that theatre can help lead people out of addiction and into recovery is rooted in the personal experience of founder Phil Fox who was a playwright, director, actor and recovering heroin addict.
“The involvement of this extraordinary group of judges, led by Enda Walsh, is a testament to the enduring legacy that Phil left us.
“We hope this panel of judges, and the urgent theme of addiction underpinning the competition, will inspire playwrights from all backgrounds to submit their scripts and bring a batch of diverse stories to the stage,” he added.
The recipient of the award will receive £6,000.
The winner will be announced in November.