Those born on this date are under the sign of Leo. They include American painter Abbott Thayer, credited with noting camouflage in the animal world, in 1849; educator/poet Katharine Lee Bates, who wrote America the Beautiful, in 1859; Christy Mathewson, baseball Hall of Fame pitcher, in 1880; moviemaker Cecil B. DeMille in 1881. Norris and Ross McWhirter, who founded the Guinness World Records, in 1925. billionaire/activist George Soros in 1930 (age 87). author William Goldman in 1931 (age 86). former national security adviser John Poindexter in 1936 (age 81). actor George Hamilton in 1939 (age 78). singer/songwriter Mark Knopfler in 1949 (age 68). former French President Francois Hollande in 1954 (age 63). author Ann Martin ( The Babysitter’s Club series) in 1955 (age 62). actor Bruce Greenwood in 1956 (age 61). rapper Sir Mix-a-Lot in 1963 (age 54). tennis star Pete Sampras in 1971 (age 46). actor Yvette Nicole Brown in 1971 (age 46). comedian Michael Ian Black in 1971 (age 46). Iraqi cleric Moqtada al-Sadr in 1973 (age 43). actor Casey Affleck in 1975 (age 42). actor Leah Pipes in 1988 (age 29). actor and model Cara Delevingne in 1992 (age 25).