Sienna Miller has split up with her fiance Rhys Ifans, according to 'The Sun' newspaper. Its reported that Notting Hill actor Rhys got jealous because gorgeous Sienna was still spending time with her ex Matthew Rhys whilst in LA. The It-Girl broke the news to Ifans on the phone whilst she was on a film set in Prague and he was in Bristol. A source told the tabloid: Things have been awkward for a while after she caught Rhys going through her text messages. She went bananas and Rhys said he was looking for what he called incriminating evidence. The shady source continues: She couldnt cope with his suspicious and jealous behaviour. Sienna Miller will be seen next in The Edge Of Love alongside fellow Brit actress Keira Knightley.