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CFOTD

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Celebrity age gap calculator

Pick any two celebrities and see exactly how far apart they were born, who is older, and how old one was when the other was born.

  • Lon Chaney Jr. is older than Marilyn Monroe by 20 years, 3 months and 22 days.
  • When Marilyn Monroe was born, Lon Chaney Jr. was 20.
  • On September 20, 1946, Lon Chaney Jr. was exactly twice as old as Marilyn Monroe.
  • Lon Chaney Jr. is Aquarius and Marilyn Monroe is Gemini.

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Famous age gaps

Birth dates and details from Wikidata (checked October 15, 2026, newest names added October 27, 2026). Ages update every day. Photos are freely licensed and credited on each profile. How we build this site · Report a mistake