Music star Passenger aka Mike Rosenberg, composer of ‘The Unlikely Pilgrimage of Harold Fry’ Baz Bamigboye/DeadlineIt’s the penultimate runthrough in the subterranean space ahead of its first preview Thursday night at the Theatre Royal Haymarket. Watch on DeadlineThe last musical Addy appeared in was a 1990 production of The Fantasticks in Regent’s Park Open Air Theatre. And with the title change, I hadn’t realized that the radio play was related to The Unlikely Pilgrimage of Harold Fry until 10 minutes into the show. During one poignant moment in The Unlikely Pilgrimage of Harold Fry, I looked at both Addy and Russell and wondered how they made their performances seem so effortless. Let’s settle for: Sprint, don’t walk, to see The Unlikely Pilgrimage of Harold Fry starring an unbelievably moving Mark Addy.