R Kelly has been convicted by a federal jury on Monday in his sex trafficking trial, where prosecutors accused the R&B singer of exploiting his stardom over a quarter-century to lure women and underage girls into his orbit for sex.

Jurors in Brooklyn federal court deliberated for a little more than a day before voting to convict the 54-year-old Kelly on all nine counts he faced, after a five and-a-half-week trial.

Kelly kept his head down as...