Radcliffe told the outlet he had gone to see Lithgow's show and visited him backstage afterward, calling the veteran actor lovely and praising his performance. The two then traded notes about leading their respective Harry Potter projects decades apart.
According to People, the pair did not get into specifics about the production, but Lithgow shared that things were going well and spoke warmly about how fond he is of the young cast. Radcliffe described the new series as very sweet and said it was reassuring to hear it was "all going well."
HBO's adaptation casts 12-year-old Dominic McLaughlin as Harry, the role Radcliffe originated on film. Alastair Stout plays Ron Weasley and Arabella Stanton plays Hermione Granger. Mark Mylod directs the first season, titled Harry Potter and the Philosopher's Stone and based on J.K. Rowling's debut novel.
Fans have had a handful of early looks at the project, including set photos and an initial glimpse of Lithgow as Dumbledore last October. The first footage arrived in a trailer released this March.
