Ralph Fiennes has one key tip for HBO’s next Voldemort

As excitement builds around HBO’s upcoming Harry Potter TV series, original Voldemort actor Ralph Fiennes has weighed in with a bit of unconventional and hilarious advice for whoever ends up taking over the iconic role.

Speaking to Entertainment Tonight while promoting 28 Years Later alongside co-star Jodie Comer, Fiennes was asked what guidance he’d offer to the next actor brave enough to portray the dark wizard. “Make sure you can handle the long, flowing robes, and don't trip over them,” Fiennes said with a laugh. “Practice your long, flowing robe walk.”

Reflecting on the behind-the-scenes realities of playing the role from 2005 to 2011, Fiennes revealed a lesser-known costume issue he faced while filming the original Harry Potter film series. The tights, originally part of a one-piece costume, proved more trouble than they were worth.

“They had a gusset that kept getting lower and lower throughout the day, it became really uncomfortable,” he shared. Eventually, he requested a change: “I then asked for individual tights, like a garter belt,” he said, adding with a grin, “So I enjoyed teasing the stunt guys by lifting up my robes and showing them my garter belt.”

HBO’s reboot, which aims to closely follow J.K. Rowling’s beloved books, is slated to arrive in late 2026 or early 2027, according to HBO and Max Content CEO Casey Bloys. While casting for the role of Voldemort remains under wraps, fans are already speculating about who might step into Fiennes’ shoes.