Britney Spears' former husband Jason Alexander has been charged with felony stalking after turning up unannounced at her home in California and attempting to allegedly gatecrash her wedding to Sam Asghari.

Alexander, 40, pleaded not guilty to the charge as well as four misdemeanours at a court hearing in Ventura County on Monday.

He also faces two counts of misdemeanour battery, one count of misdemeanour vandalism and one count of misdemeanour trespassing following the incident.

Alexander was arrested by officers from the Ventura County Sheriff's Office and taken to a local jail.

A judge set his bail at $100,000 and issued a restraining order requiring him to stay at least 100 yards from the pop star for three years.

Alexander attended the hearing virtually via video conference.

The intimate wedding ceremony between the singer, 40, and her 28-year-old fitness trainer partner Asghari was held last Thursday.

Britney Spears and Sam Asghari wed in an intimate ceremony last week Photo: Britney Spears, Instagram

High-profile celebrities including Selena Gomez, Drew Barrymore, Paris Hilton, Donatella Versace and Madonna were in attendance.

Shortly before the incident, Alexander had posted an Instagram Live story from outside Spears' property in which he said he was there to "crash" the wedding.

He was the singer's first husband but the two were married for less than three days in 2004 before an annulment.

Source: Press Association