Actress Katherine Parkinson has joined the cast of the new Harry Potter TV series. The IT Crowd star will join the HBO TV show of the popular fantasy novel series to play Molly Weasley, the mother of Ron Weasley.

"The Crown" actor Bertie Carvel and "The IT Crowd" alum Katherine Parkinson have joined the cast of HBO's "Harry Potter" series. The network announced casting for Molly Weasley, Draco Malfoy, Cornelius Fudge and more.

After an intense casting journey involving over 30,000 young actors, the search for the next generation of Hogwarts students is finally over for the Harry Potter series. Most notably, we now know who will step into the beloved role of Ron Weasley along with Harry Potter and Hermione.