Sienna Miller has told fiance Rhys Ifans to get in shape.

The 'G.I. Joe' actress wants her Welsh lover to bulk up his frail frame before they get married this summer.

A source said: "Rhys has always been quite skinny. Sienna loves him but she just wants him to tone up a bit so he looks great for their big day."

Sienna, who has previously dated Jude Law and Daniel Craig, has bought a $7,000 Power Plate exercise machine for Rhys so he can work out at home. The Power Plate, which is also used by Madonna and Amy Winehouse, uses vibrations to tone up muscles and improve fitness.

The source added to Britain's Daily Mirror newspaper: "Rhys is already using the machine. He wants to make Sienna happy. She is in Los Angeles and has left him instructions to exercise. She thinks they should both be keeping fit."

Sienna, 26, finally agreed to be Rhys' wife in February after the 39-year-old 'Notting Hill' actor popped the question several times. The couple are believed to be planning to marry on a private Mexican island.

RELATED PHOTOS AND ARTICLES
Madonna - The 2008 Rock and Roll Hall of Fame Induction Ceremony- March 10, 2008Madonna - Madonna Going To Her Gym, To Kaballah, And Then To The Recording Studio With Justin TimberlakeMadonna - Madonna in London the Day her New Child David Banda is Arriving From MalawiMadonna - Madonna in London the Day her New Child David Banda is Arriving From MalawiJude Law - 31st AFI Life Achievement Award: A Tribute to Robert De Niro - ArrivalsJude Law -
Daniel Craig Vows To Keep Playing James Bond Until Becomes OldDaniel Craig Beds Just One Girl In New Bond Film
Madonna To Adopt A Baby From IndiaMadonna Defends Her Rigorous Exercise Routine
Daniel Craig Experienced Emotional Turmoil After His First KissBritish Designer Alexander McQueen Doesn't Want Paris Hilton As Customer
BE THE FIRST TO COMMENT ON THIS STORY!
Name: (optional)
E-Mail: (required, but never displayed)
Remember your info for next time?
Profanity and other defamatory language is not allowed. Please keep it clean.