Demetri Martin is the voice of Rob. Stella and Sam was not the first Sprout show Martin appeared in as he starred in the Ruff-Ruff, Tweet, and Dave episode, "Brother Adventure," in which he played Daniel, Hatty's twin brother.
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Demetri Martin is the voice of Rob. Stella and Sam was not the first Sprout show Martin appeared in as he starred in the Ruff-Ruff, Tweet, and Dave episode, "Brother Adventure," in which he played Daniel, Hatty's twin brother.