For all things TRH(P)S-related: RockyMusic: The Musical World of Rocky Horror + The Rocky Horror Picture Show: The Offcial Fan Site!
Richard O'Brien (born Richard Smith; 25 March 1942) is an actor, television presenter, writer and theatre performer. He was born in England, and is a dual citizen of New Zealand and the United Kingdom.
O'Brien wrote the musical The Rocky Horror Show, and later presented the television show The Crystal Maze. He also co-wrote the screenplay of the film adaptation, The Rocky Horror Picture Show released in 1975, and appeared in the film as Riff Raff. The stage show has been in almost continuous production. O'Brien is also the voice of Lawrence Fletcher, the title characters' father in Phineas and Ferb.