In 1968, the Senior Class Committee at Harvard University began inviting its own speaker to Class Day. The annual ceremony is scheduled the day before commencement and is a chance for Harvard's senior class to socialize before graduating. This year, the hilarious Amy Poehler will address the graduates. Here's a roundup of some notable former guests.

Bill Clinton (2007)

Seth MacFarlane (2006)

Ali G (2004)

Will Ferrell (2003)

Bono (2001)

Conan O’Brien (2000)

See Also: 9 Famous Harvard Dropouts Not Named Gates or Zuckerberg