Hart said Thursday that it's time for a change, but she'll be leaving with mixed sentiments. It's not clear when her last day will be, but a television season traditionally ends in May.
The former English teacher from Sioux Falls, S.D., joined "Entertainment Tonight" in 1982, working most prominently with John Tesh. She's kept the job as the entertainment news industry grew around her. "ET" is the original entertainment newsmagazine and still leads in the ratings.
No replacement has been named. One potential candidate is Lara Spencer, who anchors "ET's" sister broadcast, "The Insider."