Heidi Hynden Walch (born February 1, 1971) is an American actress, voice actress, writer and singer. She is best known for voicing Starfire in both Teen Titans and Teen Titans Go!, Princess Bubblegum in Adventure Time, Penny Sanchez in ChalkZone and Viridi in Kid Icarus: Uprising.
She provided guest voices in the episode "Babe Hollytree in: I Wish One Person Had Died".