Rhys Ifans has written a lament for Sienna Miller. The 'Notting Hill' actor bears his soul on the track 'Stonefinger' and admits he was "heartbroken" when he recorded the vocals to the track for his new band The Peth - Welsh for The Thing. The song features lyrical outpourings from Rhys such as: "Every little thing you said would break me/All of it came true/Every bit of love I give/You mock it/Yes you do." Rhys' heartfelt track will feature on the band's forthcoming debut album 'The Golden Mile' - named after an area in Cardiff where the band used to hang out. The band's sound has been likened to Oasis and Super Furry Animals - a band which Rhys was an early member of. Sienna, 26, dramatically dumped 39-year-old Rhys in June, leaving him distraught. After a series of drunken nights out in London, Rhys retired to his home country, Wales, where he set to work on the record. Since their split, Sienna has been linked to her ex-boyfriend and 'Edge of Love' co-star Matthew Rhys and oil tycoon Balthazar Getty, who is married with four children.