Leto is a surname. Notable people with the surname include: Antonio Leto (1844–1913), Italian painter Jared Leto (born 1971), actor and singer of band Thirty Seconds to Mars Julie Elizabeth Leto (born 1965), American writer of romance novels Julius Pomponius Laetus or Pomponius Leto (1425–1498), Italian humanist Marco Leto (1931–2016), Italian film and television director and screenwriter Norman Leto (born 1980), Polish artist Peter Leto, American television director and television producer Sebastián Leto (born 1986), Argentinian footballer Shannon Leto (born 1970), American drummer of band Thirty Seconds to Mars