Zac Efron and Michelle Rodriguez's low-key romance is over - before either star confirmed they were dating, according to reports.

The actors sparked rumors of a new relationship when they were photographed kissing while on holiday in Italy in July (14), and again when the High School Musical jetted from Los Angeles to meet Rodriguez in Ibiza, Spain, earlier this month (Aug14).

However, it seems the fling has since fizzled out, and a source tells Us Weekly that the break-up was mutual.

Prior to dating the Fast & Furious beauty, Efron dated Vanessa Hudgens for three years until 2010, while Rodriguez was recently linked to model/actress Cara Delevingne.