Mark Justin Roiland (born February 21, 1980) is an American voice actor, animator, writer, and producer. He co-created the Adult Swim animated sitcom Rick and Morty, for which he voiced the protagonists Rick Sanchez and Morty Smith in seasons 1 through 6 from 2013 to 2022, as well as Hulu's Solar Opposites, in which he voiced the main character, Korvo, in seasons 1 through 3 from 2020 to 2022, until both networks severed ties with him in 2023. He had also voiced Earl of Lemongrab in Adventure Time, Blendin Blandin in Gravity Falls, and Oscar in Fish Hooks.
https://en.wikipedia.org/wiki/Justin_Roiland