Sienna Miller and boyfriend, Brother's and Sisters star, Balthazar Getty have broken up, the Mirror report. Insiders say Miller called it a day for good after becoming tired with her on and off relationship with the married father-of-four. "Sienna loved being with Balthazar, but there was too much baggage and she couldn't commit to anything more than a few months. They are still good friends," a source said before claiming the actress was ""getting more and more friendly" with Hollywood star Josh Hartnett. "Josh and Sienna have a unique bond. They understand each other and I wouldn't be surprised if a relationship blossomed." 
