SCARLETT Johansson has been trying to lose weight with the help of her Iron Man 2 co-star Gwyneth Paltrow.

Scarlett has reportedly lost over 6.3kg since she began working out
with Gwyneth in preparation for the new movie, in which she will
reportedly wear a skintight catsuit to play the Black Widow, a Russian
spy.

"The pair have been doing daily workouts with Gwyneth
s personal
trainer Tracy Anderson. Scarlett is also staying away from
carbohydrates," a source said. - BANG Showbiz / AP