SIENNA MILLER AND RYAN IFANS WANT DUET

Sienna Miller and Rhys Ifans are set to record a duet.The pair, who are believed to have been dating since August, are planning to emulate their music idols Oasis and perform a romantic rock track. A source said: "Rhys really likes Oasis, particularly Noel Gallagher so that's the kind of music he would like to make."Sienna has always dreamed of being a famous singer and is confident of chart success with Rhys. The source added to Britain's Daily Express newspaper: "Sienna really enjoys singing and always wanted to be a rock star. Rhys has been very encouraging and convinced her to do something about pursuing her dreams."Rhys, who plays the guitar, was in the original line-up for Welsh band the Super Furry Animals. The 'Notting Hill' actor recently returned to the recording studio to work on new material with his former bandmate, drummer Dafydd Ieuan.Rhys is close friends with Oasis stars Noel and Liam Gallagher and famously starred in the video for their UK number one single 'The Importance of Being Idle'.Sienna, who is set to follow in the footsteps of her rival Kate Moss by recording a duet with her lover, was overheard practising her harmonies with Rhys during their romantic break in Mexico City last month.Kate, whose vocals were features on ex Pete Doherty's song 'La Belle et la Bete', has previously accused Sienna of stealing her style and her friends.

WILL THERE BE A SIENNA MILLER WEDDING ?

Beautiful Sienna Miller

Sienna Miller's new love Rhys Ifans has asked her to marry him five times.Sienna - who has constantly denied she is dating Rhys, despite the pair frequently being pictured together - isn't taking their romance seriously, while the 'Notting Hill' actor is "besotted" with her and desperate for them to wed.A source said: "Their romance has been a big secret for months now. Friends believe Sienna sees the relationship as a bit of fun, while Rhys has fallen in love. Rhys wants the world to know but Sienna was keen to play it down - even though she usually flaunts her romances."He is besotted, totally in love. He can't believe his luck. He has already asked Sienna to marry him about five times but Sienna just laughs it off."His friends are worried that she will break his heart when someone better comes along."Rhys, 39, has reportedly fallen out with his two best friends, fellow Welsh actors Ioan Gruffudd and Matthew Rhys, after they accused him of "stealing" Sienna from Matthew.Sienna, 25, briefly dated Matthew in the summer after they met while filming 'The Edge of Love', and Rhys has been ostracised by his friends since he started romancing her.The source added to Britain's Daily Mirror newspaper: "Rhys Ifans' name is mud among his former band of Welsh acting buddies. They all think it is disgraceful behaviour that he stole someone else's girl."Sienna's close friends are certain the relationship will not last because Rhys parties too much and lives "like a student".One friend said: "He blows everything he earns on going out and drinking. He lives like a total student. His place is a mess. He has lots of really weird habits."