The model, 36, and her rock guitarist boyfriend, 40, said their vows in front of a handful of friends and family in a ceremony described as "very romantic".
Moss went up the aisle barefoot and wearing a see-through white gown at a small church in Sicily, according to reports.
Her daughter Lila Grace was one of three ring bearers at the wedding, three years after Moss and Hince, guitarist with The Kills, first met.
They were introduced by Sadie Frost following one of Hince's gigs, and got engaged on Moss's 36th birthday in January.
A source told the Daily Mirror the plans had been kept secret because the couple were intent on having a quiet ceremony away from prying eyes.
The source said: "[Kate has] never been one for convention or tradition, but Jamie’s been there for her through thick and thin, and she simply felt the time was right."
Following the ceremony, local villagers reportedly joined in the festivities as the wedding party celebrated outside the church.