Robot and Monster is an American CGI animated series created by Dave Pressler, Joshua Sternin and J.R. Ventimilia. Main characters Robot and Monster are voiced by Curtis Armstrong and comedian Harland Williams, respectively. It began production in 2009 and was … Curtis Armstrong, Harland Williams, Maurice LaMarche, Jonathan Slavin, Megan Hilty, Cree Summer, Rhea Perlman Added on Paramount 2023-05-18.