Leo is the fifth sign of the zodiac in astrology, represented by a lion. People born between late July and late August are said to be Leos. In astrology, Leos are often described as confident, creative, and natural leaders who enjoy being in the spotlight.

Leo is also a constellation, a group of stars that ancient astronomers imagined formed the shape of a lion in the night sky. The constellation Leo is one of the oldest recognized star patterns, known to civilizations for thousands of years. You can spot it in the spring sky in the Northern Hemisphere by looking for a backward question mark of stars that forms the lion's head and mane. The brightest star in Leo is called Regulus.

Leo is also a popular name for boys, sometimes short for Leonardo or Leopold. Famous people named Leo include the writer Leo Tolstoy, and famous fictional Leos include Leo Valdez from Rick Riordan's Heroes of Olympus series.