Donmar Warehouse plans to recruit 13 paid trainees under a new career development programme.
Catalyst trainees will work in either creative or administrative roles. Special focus will be given to talent currently underrepresented in the industry, such as working class and D/deaf and disabled artists.
Trainees will be mentored by leading creatives and members of the Donmar Warehouse team.
Director Nadia Latif said most theatre artists understand the importance of opening access to people "who look like us or share our backgrounds".
"Theatre making should be transparent, accessible, and our rehearsal rooms should bustle with a multitude of people with totally different life experiences feeding each other creatively and taking care of one another."