Trivia: Austin doesn't just have "bad" and "good" teeth - there were three sets of teeth that they interchanged to give different effects. In the romantic scenes they used the nicest ones so as not to gross-out all the females in the audience.
Trivia: When Austin is listing off his deceased friend/celebrities and how they died, he says, "Mama Cass - ham sandwich." Most people (including, apparently, Austin Powers) believe that is how she died. However, the autopsy revealed the true cause of death to be heart failure. See this website for more info: http://www.casselliot.com/facts.htm.
Trivia: Austin Powers is evidently to blame for the more grounded and grim approach of the Daniel Craig Bond films. Craig once quipped in an interview that while he was a fan of creator Mike Myers and the character, the Austin Powers series "f**ked" the Bond franchise with its heavy satire. As a result, he and the producers had to rebuild the franchise, feeling that modern audiences would no longer accept the classic Bond tropes and cliches that Myers had lampooned with the three Austin Powers films.
Trivia: Mike Myers was inspired to create the character while driving home one night. The song "The Look of Love" by Burt Backarach came on the radio, and he mused to himself "Where have all the swingers gone?" This planted the idea of a 60's swinger struggling in the 90's in Myers head, and this idea for a character eventually became Austin Powers. Myers was also loosely inspired by one night when he jokingly flirted with his wife using an over-the-top fake British accent.