Updated

Former CIA director David Petraeus is making his first public speech since resigning in November over an extramarital affair.

The former four-star general is scheduled to speak Tuesday night at a University of Southern California event honoring the military.

A prepared text of his speech, obtained by The New York Times, indicates Petraeus will apologize for the affair with his biographer, Paula Broadwell. Petraeus is expected to acknowledge that he's "regarded in a different light now" than he was a year ago and that he'll try to make amends and move forward as best he can.

The 60-year-old famed Iraq and Afghan war general retired from the military in 2011 and went on to lead the CIA. President Barack Obama accepted his resignation from the intelligence agency on Nov. 9, saying Petraeus had "made our country safer and stronger."

The affair was discovered during an FBI investigation into emails Broadwell sent to another woman she saw as a rival for Petraeus' attention -- emails the other woman viewed as threatening.

Petraeus told his staffers at the time that he was guilty of "extremely poor judgment" in the affair. "Such behavior is unacceptable, both as a husband and as the leader of an organization such as ours," he told CIA employees in a statement.