Hilary Duff has rekindled an old flame... and sealed her reconciled relationship with a kiss, according to TMZ.com. The actress is back together with her ex-boyfriend and music producer Matthew Koma, who she split with back in March. The couple was seen having a romantic time together in Los Angeles on Tuesday. Duff told The Talk that it’s the third time she and Koma are in a relationship. “Timing is such a big deal ... third time’s a charm!” she added.