Margaret Hamilton will forever be remembered as the Wicked Witch of the West from The Wizard of Oz, but her career did not end there. She spent decades delighting television audiences, often playing quirky or downright spooky characters that made her instantly recognizable. While her witchy cackle may have frightened generations of children, Hamilton herself was a gentle soul who loved to poke fun at her most famous role — and explain to kids that the green-faced villain wasn’t real.

One of her most memorable guest spots came in the mid-1970s on Mister Rogers’ Neighborhood. After learning that many children were frightened of her most famous character, she appeared on the show to explain the Wicked Witch costume and reassure kids that she was kind in real life. Around the same time, she also appeared on Sesame Street, once again donning the green makeup and pointy hat to reprise her Wicked Witch role in the now infamous 1976 episode.