Walter Marvin Koenig (/ˈkeɪnɪɡ/; born September 14, 1936) is an American actor and screenwriter. He began acting professionally in the mid 1960s and quickly rose to prominence for his supporting role as Ensign Pavel Chekov in Star Trek: The Original Series (1967–1969). He went on to reprise this role in all six original-cast Star Trek films. He has also acted in several other series and films including Goodbye, Raggedy Ann (1971), The Questor Tapes (1974), and Babylon 5 (1993). In addition to his acting career, Koenig has made a career in writing as well and is known for working on Land of the Lost (1974), Family (1976), What Really Happened to the Class of '65? (1977) and The Powers of Matthew Star (1982).
Koenig was born in Chicago, Illinois, the son of businessman Isadore Koenig and his wife Sarah (née Strauss).[citation needed] They moved to the Inwood neighborhood of Manhattan when Walter was a child, where he went to school. Koenig's parents were Russian Jewish immigrants from the Soviet Union; his family had been living in Lithuania when they emigrated, and they shortened their surname from "Königsberg" to "Koenig".
Koenig's father was a communist who was investigated by the FBI during the McCarthy era. Koenig attended Grinnell College in Grinnell, Iowa, with a pre-med major. He transferred to UCLA and received a Bachelor of Arts in psychology. After a professor encouraged Koenig to become an actor, he attended Neighborhood Playhouse School of the Theatre in New York City with fellow students Dabney Coleman, Christopher Lloyd, and James Caan.