Russian author Leo Tolstoy wrote the acclaimed novels War and Peace, Anna Karenina and The Death of Ivan Ilyich, and still ranks among the world's top writers.

A New York governor who became the 26th U.S. president, Theodore Roosevelt is remembered for his foreign policy, corporate reforms and ecological preservation.

Jackie Robinson became the first African-American to play major league baseball, becoming Rookie of the Year in 1947, National League MVP in 1949 and a World Series champ in 1955.

Abraham Lincoln was the 16th president of the United States. He preserved the Union during the U.S. Civil War and brought about the emancipation of slaves.

Doris Kearns Goodwin is best known for authoring biographies of American presidents, including Lyndon B. Johnson, John F. Kennedy, Franklin D. Roosevelt and Abraham Lincoln.

Sugar Ray Leonard was a champion Olympic and professional welterweight boxer. He retired from the sport in 1997 and was inducted into the Boxing Hall of Fame.

Mary Lou Retton is a retired champion gymnast who won gold, silver and bronze medals at the 1984 Olympics. She was featured on the Wheaties cereal box.

One of the most beloved athletes of the 1970s, track athlete Bruce Jenner won a gold medal and set a world record in the decathlon at the 1976 Summer Olympics. Since then, he's appeared on the popular reality show Keeping Up with the Kardashians.

American diving champion Greg Louganis won 13 world championships and made history at the 1982 Olympics as the first diver ever awarded a perfect score.