Prompt
Generate a realistic portrait of John Gould Rubin, a middle-aged American man with a gentle expression, dressed in attire suitable for a theater professional, possibly standing in front of a subtle background that hints at his work in theater, such as a softly blurred image of a stage or a classic playhouse; he should be depicted with a calm demeanor, reflecting his involvement in the arts as an actor, director, and producer, and subtly suggesting his connection to notable works like The Private Theatre and Theater for a New Audience.