Asghari also shared loved-up pictures from the special day on his Instagram account.
On Monday, reports emerged that the duo had purchased a new home, a $11.8m (R189m) Calabasas home close to her ex-husband Kevin Federline and two children, Sean and Jayden.
According to Daily Mail, the duo moved into their new home earlier this week.
This is the third marriage for Spears and a first for Asghari.
Spears married Jason Alexander, her childhood friend, in a surprise ceremony in Las Vegas in 2004 but the marriage was annulled shortly after. Nine months later, she married dancer Kevin Federline, with whom she had two children. That marriage ended in divorce in 2007.
— Additional reporting by Reuters