Happy Birthday to actor Colin Hanks (1977), Grey's Anatomy actress Katherine Heigl (1978), actress Denise Crosby (1957), basketball legend Oscar Robertson (1938), and piano man Scott Joplin (1868; d. 1917).

You know them, you love them...and you certainly wouldn't want to piss them off. So who are they? They are the uber tough heroines who prove time and again that one doesn't need a y chromosome to kill bad guys, protect loved ones and ultimately save the day.

Happy Birthday to Grey's Anatomy actress Katherine Heigl (1978), actress Denise Crosby (1957), basketball legend Oscar Robertson (1938), piano man Scott Joplin (1868; d. 1917), and 12th President of the United States Zachary Taylor (1784; d. 1850).