Experts decided to touch up the pictures after they noticed the 67-year-old's Fonda's sweat patch under her arm and her saggy chin, which, after some computer tinkering, resulted in a painless face-lift for the double Oscar-winner.
The profile of 32-year-old co-star Jennifer Lopez was also altered to reduce the appearance of her nipple under her halter-neck top.
'Monster-in-Law' is Fonda's first film in 15 years. She last appeared in 'Stanley and Iris' with Robert De Niro, back in 1990.
In her new role, she plays the merciless mother of Charlotte Honeywell, played by Lopez, who tries to ruin her daughter's love life after having gone on an endless string of blind dates, which all go disastrously wrong, until she meets the perfect man, played by Michael Vartan.
Fonda is due to have a hip replacement operation soon and may have to attend the film premiere in May on crutches.
The film, directed by Robert Luketic and written by Anya Kochoff and Richard LaGravanese, is released on May 6.
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