Arts & Entertainment:
* Matt Damon (1970) - Actor
* Colbie Caillat (1985) - Singer-songwriter
* Bill Murray (1950) - Actor
* Keanu Reeves (1964) - Actor
* James Gandolfini (1961-2013) - Actor
* Liam Neeson (1952) - Actor
* Morgan Freeman (1937) - Actor
* Anne Hathaway (1982) - Actress
Politics & History:
* Nelson Mandela (1918-2013) - South African anti-apartheid revolutionary, political leader, and philanthropist
* Laura Bush (1946) - Former First Lady of the United States
Science & Technology:
* Stephen Hawking (1942-2018) - Physicist and cosmologist
Sports:
* Mickey Mantle (1931-1995) - Baseball player
* Greg Norman (1955) - Golfer
This list includes some of the most prominent individuals born on September 18th, but there are many other notable people born on this date.