Dafidd met Harold Clurman, the founder of The Group Theatre, by circumstance at the University of New Mexico. Dafidd, a political science major at the time, accidentally walked into Clurman's Master class and was not asked to leave. He was struck by Clurman's passionate style and ideals, leading him to switch his major to theatre arts within three days.
In college, Dafidd acted in various productions, winning accolades and the prestigious John F. Kennedy Center/American College Theatre Festival Award for acting. This led to an invitation to join the professional resident acting company at the Tony Award-winning Alley Theatre in Houston.
Dafidd's first week at the Alley saw him cast in a play opposite Ruth Nelson, a founding member of The Group Theatre. He experienced repertoire theatre and worked alongside renowned actresses, including Emmy, Tony, and Academy Award nominee Kim Stanley.
Dafidd met Alan Ayckbourn, a prolific and award-winning British playwright, who asked him to take part in the first ever exchange of acting companies between the US and the UK. As a member of Ayckbourn's repertoire acting company, Dafidd spent a year in England, performing almost every night.
Upon returning to the US, Dafidd relocated to the San Francisco Bay area and established himself as a veteran stage actor, working with companies such as the Berkeley Stage and the Bay Area Playwrights Festival. He met Stella Adler, a founding member of The Group Theatre, who encouraged him to relocate to New York and study with her.
In New York, Dafidd took a part-time job as a bartender at the Neil Simon Theater, where he met Aaron Sorkin. They became friends, and Dafidd has since appeared in several of Sorkin's projects, including Sports Night and The West Wing.
Dafidd made his film debut in 1987 in an uncredited role in John Schlesinger's The Believers and his TV debut in 1988 in a recurring role on The Young and the Restless. He has since moved freely between film, TV, and stage, also working as a director, writer, and coach.
