Dennis was a member of Dudley Dursley's gang.
Behind the scenes
Dennis was portrayed by Christopher Rithin in the film adaptation of Harry Potter and the Order of the Phoenix, though he was not credited (unlike Piers and Malcolm).
Dennis was a member of Dudley Dursley's gang.
Dennis was portrayed by Christopher Rithin in the film adaptation of Harry Potter and the Order of the Phoenix, though he was not credited (unlike Piers and Malcolm).