 Gary Oldman (qv) had agreed to be the voice of General Grievous,  but pulled out of the film because it was being made using actors  who are not part of the Screen Actors Guild, of which Oldman is a  member. The role was read by Duncan Young (I) (qv) on set, and  finally voiced by Matthew Wood (I) (qv), who, being a Lucasfilm  employee, submitted his reading under the name of  Alan Smithee (qv).