A surveillance camera captured video of a woman getting away with a $5,000 dress from a bridal boutique in Fanwood.
Owners of Seng Couture tell ABC News that the woman came in with her daughter and eight members of her alleged bridal party.
After trying on several gowns, police say the woman walked out with the expensive dress as her bridal party blocked the view.
Right behind suspect, on the video, is a little girl, believed to be the woman's daughter. Both walked through the parking lot and get into a car.
Police say the girl may have been used as a decoy in the heist.
Information from ABC News contributed to this report