Washington, April 12 -- Before Jason Isaacs became known for his role in 'The White Lotus', he was already familiar to many as Lucius Malfoy from the Harry Potter series. And for Tom Felton, who played his on-screen son Draco Malfoy, Isaacs will always be "Dad."

While speaking to People ahead of the opening of the new Harry Potter Shop in Chicago, Felton, 37, opened up about how close he still is with Isaacs.

"I still call him 'Dad.' So we're very close," Felton told People.

Felton shared that the last time he saw Isaacs, the actor was about to leave for Thailand to shoot The White Lotus. "I was thrilled to watch him do his thing," Felton added.

Talking about the show, Felton said, "It was great. I'm a big fan of the show, and the cin...