The incident took place in Binapur village under Amapur police station as Gauravi, along with other children, was watching the 'barat' pass by, police said.
The bride's father, Vinod, and his cousins, reportedly under the influence of alcohol, opened celebratory firing. A bullet hit the girl killing her on the spot, police said.
By the time police rushed to the spot, the accused as well as others in the procession had fled.
The father of the deceased has lodged a police complaint against three persons. Efforts are on to nab them, police said.