<P> Marceline the Vampire Queen is a character in the American animated television series Adventure Time created by Pendleton Ward . She is voiced by Olivia Olson in most appearances , by Ava Acres as a child and by Cloris Leachman as an old woman . Marceline is a fun - loving 1,000 - year - old vampire queen . The artistic design for Marceline was created by Ward , with small changes and additions added by Phil Rynda , former lead - character designer and prop designer for Adventure Time . Unlike a traditional vampire , Marceline does not need to drink blood to survive ; rather , she eats the color red . Marceline is a musician who plays an electric bass that she made from her family 's heirloom battle - axe . </P>
who does the voice of marceline on adventure time
voiced by Olivia Olson in most appearances , by Ava Acres as a child and by Cloris Leachman as an old woman