The 40-year-old singer, who legally wed the British socialite at a London registry office on September 5, hosted an intimate wedding ceremony and reception at her mother's Marsana estate yesterday, reported E! Online.
The couple's secret civil ceremony apparently took place one day after they attended Elton John's annual End Of Summer party in Windsor earlier this month.
"They got married the morning after Elton's party. Sofia joked to friends that she was almost too hungover to get married," a source said.
The 'Bonfire Heart' hitmaker proposed to the blonde beauty, who is the granddaughter of the Duke of Wellington, last December after being introduced by his sister, Daisy, in 2012.