But the Latina beauty is not planning another addition to her family just yet - the rounded tummy is just part of her costume.
The 39-year-old actress is playing the part of a mother-to-be in her new movie The Back-Up Plan.
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In the film, Lopez's character is so desperate to have a baby she artificially inseminates herself.Jennifer Lopez crazy
She becomes increasingly desperate to hide the signs of her pregnancy from her new man, resulting in a comedy of errors.Jennifer Lopez hot
However when he finds out the reason for her strange behaviour he decides to support her decision.Jennifer Lopez sexy
J-Lo filmed several scenes with Moonlight actor Alex O'Loughlin, who plays her love interest in the film.The 39-year-old actress was joined on the New York film set by her one-year-old son and daughter yesterday.
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Twins Max and Emme were cared for by Jennifer's mother Guadalupe as the actress filmed her scenes in the romantic comedy.
