Sienna Miller and Tom Sturridge split - report

British acting stars Sienna Miller and Tom Sturridge have called off their engagement, according to a U.K. report.

The American Sniper star and her partner of four years amicably split last month (Jun15) and even went on a family holiday to the Spanish island of Ibiza with their three-year-daughter Marlowe, it is claimed.

A source tells Britain's The Sun newspaper, "Tom and Sienna split a few weeks ago but still love and respect each other as friends and parents... It's a very amicable breakup and they intend to remain great friends... It was just a case of them being honest with each other and putting first the fact they are parents."

The pair began dating in 2011.