The supermodel was reportedly joined in Sicily, Italy, by just a few close friends and family members as she tied the knot with The Kills rocker Jamie Hince - who she started dating in September 2007 - on August 7.
A source said: "It was quiet - but still very romantic.
"Kate`s had a fairly turbulent love life but she`s a romantic at heart. The plans were kept very quiet as Kate wanted the day to be low-key and purely a celebration of their love. She`s 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."
Kate - who wore a see-through white dress and was barefoot for the ceremony - and Jamie reportedly decided to go to the idyllic island to avoid as much attention as possible, and chose a small picturesque church to declare their love for one another.
The British star`s eight-year-old daughter Lila - whose father is Kate`s ex-boyfriend Jefferson Hack - was one of three ringbearers at the ceremony.
The 36-year-old beauty was determined to keep the ceremony "spiritual" and the couple celebrated their love by dancing under the trees.
The source added to the Daily Mirror newspaper: "They planned the day for weeks and were so excited. Kate didn`t want a stuffy, formal do, but something spiritual.
"Minutes after tying the knot, the giggling newlyweds were outside the church, dancing under trees."
Kate has had an eventful love life since her rise to modelling fame as a teenager, and has dated many stars including actor Johnny Depp, photographer Mario Sorrenti and rocker Pete Doherty.
She has been spotted wearing a huge rock on her ring finger several times over the past few months, and it is believed Jamie proposed on her birthday in January.