Actress Scarlett Johansson and Romain Dauriac
Scarlett Johansson has secretly married fiancé Romain DauriacGetty Images

Scarlett Johansson has secretly married her fiancé, Romain Dauriac, according to reports.

The 30-year-old actress is said to have married the French journalist in a secret ceremony following the birth of their first child in September.

"Scarlett and Romain were married in a very intimate ceremony after the birth of their daughter. They kept the wedding a big secret because they both wanted privacy," said a source at the New York Post's celebrity column, Page Six.

The wedding is believed to have taken place in a remote and natural location in the United States.

The couple, who started dating in 2012 and got engaged in 2013, ignited rumours they had got married after the Hollywood star was spotted wearing a wedding ring at a Hurricane Sunday fundraising event in New York.