7th Heaven star Beverley Mitchell married accountant Michael Cameron on Wednesday, her publicist Nicki Fioravante confirms exclusively to PEOPLE.

The couple were married in Ravello, Italy. Mitchell, 27, wore a wedding gown by Melissa Sweet while Cameron, 27, wore a tux by Kenneth Cole.

According to sources, among the 100 guests were Mitchell’s former costar – and bridesmaid – Jessica Biel and her boyfriend Justin Timberlake. 7th Heaven’s Mackenzie Rosman was also in attendance.

Biel, who has been staying at the sumptuous Palazzo Santa Croce, a $2,8000-a-night villa in Positano, was spotted attending a rehearsal for the wedding on Tuesday.

Mitchell and Cameron got engaged on New Year’s Eve in 2005 in Colorado. He proposed with a 3.5-carat yellow diamond ring by designer Louis Glick.

“They are a really good fit for each other,” a source close to the couple told PEOPLE at the time. “Her friends and family are thrilled.”

Mitchell, who grew up in Arcadia, Calif., played middle-child Lucy Camden on the WB drama. She also has appeared on Quantum Leap, Melrose Place and in the horror flick Saw II.

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Pictures below: Jessica Biel in the wedding party!