Longtime University of Georgia President Michael Adams is retiring.

Officials familiar with the decision told The Associated Press that Adams will make a formal announcement Thursday at the UGA campus in Athens. The officials say he will retire in June 2013 after more than 15 years at the helm of the state's flagship university.

The officials spoke on the condition of anonymity because Adams' retirement was not yet public.

UGA spokesman Tom Jackson declined comment. Board of Regents chairman Ben Tarbutton also declined comment.

Under Adams' leadership, UGA has climbed in college rankings and national profile. The university's enrollment has swelled to 35,000, including its most selective freshman class in its history.

Adams has brought in more than $1 billion in new construction since he took office in 1997.

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