Rumours of a romantic reunion between Jude Law and Sienna Miller have gone into overdrive after the actress was photographed leaving her former fiance's New York apartment on Wednesday.

The pair was once engaged to be married, but Miller dumped her longtime lover in 2006 after it was revealed he had cheated on her with his children's nanny.

The Hollywood stars have remained friends since the split and both recently moved to New York City to work on Broadway.

The Alfie actor has been spotted out and about with his former partner several times over the last few weeks - sparking speculation they are giving their relationship another go.

Law's representative recently shot down rumours of a reunion, but tabloid gossips were sent into a spin on Wednesday when Miller was snapped leaving the star's apartment at lunchtime, just six minutes after her former lover left the building.

A source tells Britain's Daily Mail newspaper, "They have never stopped caring about each other and that has quickly become clear. They are taking things incredibly slowly, but they are getting back together again."