Actress Sienna Miller gave birth to her first child over the weekend in London, according to Us Weekly.

Miller and her fiance, Tom Sturridge, would not give details on their new arrival's name, weight or even gender. The couple have been dating for over a year and were engaged in February.

The actress is best known for her roles in such movies as "Factory Girl", "Alfie" and "G.I. Joe: The Rise of Cobra".