Bill Mumy on Twitter: "My handsome son and beautiful daughter ..
Charles William "Bill" Mumy, Jr. (/ˈmuːmi/; born February 1, 1954[1]), is an American actor, musician, pitchman, instrumentalist, voice actor, and a figure in the science-fiction community. He came to prominence in the 1960s as a child actor, when he was credited as Billy Mumy. His most notable role was in the 1960s CBS sci-fi television series Lost in Space, where he played Will Robinson, the youngest of three children in the Robinson family.
He later appeared as lonely teenager Sterling North in the Disney film Rascal (1969), with Steve Forrest. He was cast as Teft in the film Bless the Beasts and Children (1971). In the 1990s, he had the role of Lennier in the syndicated sci-fi TV series Babylon 5, and narrated A&E Network's Emmy Award-winning series Biography. He is also notable for his musical career as a guitarist, singer, songwriter and composer: Mumy is an Emmy nominee for original music in Adventures in Wonderland (1991). As a musician Mumy performs as solo artist, an occasional guest performer, and as half of the duo Barnes & Barnes.