A source said: "To play a man convincingly Angelina is adamant she needs to lose her curves."
Friends claim Angelina is so determined to look like a boy she has turned to the Martha's Vineyard Detox Diet to help shrink her already slender frame.
The extreme diet -(The Master Cleanse) which was popular in Hollywood in 2007 - encourages followers to ingest liquids every two hours to "cleanse the body." Solid food is strictly prohibited.
Angelina Jolie Arrested in City Centre Men in uniforms grabbed the mother of six under the arms in the city’s centre and led her in an unknown direction. Shooting of her upcoming film "Salt"
The Master Cleanse claims to be a way to cleanse the body of toxins.
The cleanse involves drinking only lemonade made from fresh lemon or lime juice, maple syrup, water and Cayenne pepper. No solid food is eaten for the entire cleanse. The Master Cleanse is technically not a fast; and proponents say it is more gentle on the body because it does contain some essential vitamins and minerals. According to proponents it is recommended to be on the cleanse for a minimum of ten days, but some people stay on the cleanse for longer periods of time, even as long as 45 days.
The cleanse can have tons of exhausting and gross side effects. This is what supposedly has movie execs on Jolie's new flick Salt so concerned. Angelina is supposed to do her own stunts as a CIA officer in the Russian spy movie, but producers are worried this silly diet is going to make her too tired and fragile to kick any serious ass.
UPDATE: 2 Apr 2009
Brad Pitt has demanded Angelina Jolie to marry him.
The 45-year-old actor - who has been dating Angelina since 2005 and raises six children with her - has reportedly told twice-divorced Angelina he will not have any more children with her unless she agrees to tie the knot.
A source told America's OK! magazine: "Brad's told her, 'Marry me, or it's over.' He definitely wants to get married before they have any more babies."
Brad - who was previously married to Jennifer Aniston - is said to be feeling increasingly frustrated with the lack of time he is spending with Angelina, 33.
He is currently staying in New York's Waldorf Astoria hotel with the children to be closer to Angelina, who is filming new spy movie 'Salt' in the city.
The source added: "Their relationship is so out of kilter, he believes marriage is the only thing that will bring it back around.
"He needs to know Angelina is really committed to him. Becoming Mrs. Pitt would give him that answer."
It was recently reported Brad had pleaded with Angelina to attend couples' counselling in a desperate bid to save their relationship.
Angelina is said to have agreed, but only after seeking the advice of her ex-husband Billy Bob Thornton.
A source told Britain's Grazia magazine: "This just caused more friction with Brad because although he doesn't have a problem with her talking to her exes, he doesn't understand why she would take Billy Bob's advice to try therapy as when he suggested it to her she reacted very angrily."