<Tr> <Th> Title </Th> <Td> King (self - proclaimed) </Td> </Tr> <Tr> <Th> Family </Th> <Td> Betty Grof (ex-fiancée) Neptr (son) </Td> </Tr> <P> The Ice King is a character in the American animated television series Adventure Time . A supposedly evil wizard capable of creating and manipulating ice and snow, he is the self - proclaimed king of the Ice Kingdom, a land of ice he claimed as his own where he lives in the company of many penguins . Although technically an antagonist, he sometimes helps the main characters and is the protagonist of several episodes focusing on his struggles or backstory . The character is voiced by Tom Kenny . </P> <P> Originally depicted as a two - dimensional, humorously over-the - top villain trying to kidnap Princess Bubblegum on a regular basis, the character's personality was subsequently expanded, revealing him to be a kind - hearted but misunderstood old man with completely twisted senses of morality and social behavior, suffering from loneliness and memory loss . Later seasons unveil his tragic backstory, revealing he was once a good human named Simon Petrikov who lost his mind, memories, and loved ones due to the magic crown giving him his ice powers . </P>

Who plays the ice king in adventure time