Sergei Korolev
- id: PER-003
- lifespan: 1907–1966
- known_for: chief designer of the early Soviet space program
- missions: Luna 3
- confidence: believed-correct
Sergei Korolev was the chief designer behind the Soviet space program's founding triumphs — Sputnik, Yuri Gagarin's flight, and the first lunar probes, including Luna 3. His identity was a state secret during his lifetime; he was known publicly only as "the Chief Designer" until his death in 1966, after which his name was finally celebrated.