Megan Fox shows off her slim post-baby body on the Teenage Mutant Ninja Turtles set, just seven weeks after giving birth to son Bodhi Ransom Green. Credit: FameFlynet

Turtle-y skinny! New mom Megan Fox returned to work Tuesday, April 1, seven weeks after welcoming son Bodhi with husband Brian Austin Green.

The 27-year-old actress, who plays reporter April O'Neil in the upcoming Teenage Mutant Ninja Turtles movie, was joined by costar Will Arnett for reshoots. Fox looked slim and beautiful in blue jeans, a graphic tee, and a mustard-yellow leather jacket as she returned to work.

Fox welcomed her second baby boy, Bodhi Ransom, with 40-year-old Green on Feb. 12. The two are already parents to 18-month-old son Noah. (Green also shares 11-year-old son Kassius with ex-girlfriend Vanessa Marcil.)

Just last week, Fox excitedly shared the trailer for the upcoming Michael Bay-produced action flick on her Facebook page. "In what is sure to be the pinnacle of my career in terms of my own overjoyed fangirlness...behold the trailer for TEENAGE MUTANT NINJA TURTLES," she gushed Thursday, March 27. "Go Ninja Go Ninja GO!"

The trailer was first revealed at CinemaCon in Las Vegas last Monday. Arnett, who plays O'Neil's cameraman Vernon Fenwick in the action flick, sang Fox's praises on Tuesday in an interview with IGN. "She's a kickass April," the 30 Rock alum said of his costar. "Megan did such a great job. There are some great sequences that she has and that we both have together that are really high octane where we're fighting all sorts of bad dudes."

Ninja Turtles will hit theaters Aug. 8.