The lucky lady, Ashley Harlan, is a 2009 graduate from St. Francis University in Pennsylvania -- TMZ obtained these pics of Ashley hangin' with college friends. She earned a bachelor's degree and a master's in physician assistant science.
Ashley was also a high school studette in volleyball, softball, and basketball.
Her hometown paper -- the New Castle News -- is confirming the engagement ... but Big Ben has been mum on the subject. Not like he's got anything else going on ... (cough cough) playoffs.