Kristin Bauer van Straten Kristin Bauer van Straten

When Maleficent (Kristin Bauer van Straten) returns to Once Upon a Time, she's going to look even more wicked!

"One of the things I was sorry... I didn't do [with] Maleficent was a much more elaborate headpiece," Emmy-nominated costume designer Eduardo Castro told TVGuide.com during a recent visit to Once's Vancouver set. "Now, the new headpiece will be more like the cartoon. And I think it's going to be quite spectacular."

Go behind the scenes of Once Upon a Time

To find out more behind-the-scenes secrets — like how they get Rumplestilksin to look so villainous! — check out our full interview with Castro below.