The cute little girl scattering petals in your path will look adorable no matter what she is wearing, but as a member of the wedding party you still want to get her look just right and flower girl dress is an important part of that. These dresses of flower girl should help to inspire you.
Once the flower girl has walked down the aisle, her main duties are looking adorable and starring in some of the wedding photos. Older flower girls may stand at the altar with the bridesmaid, while younger ones tend to sit with their parents or grandparents during the ceremony.
Many designers have flower girl dresses in the same style as bridesmaids' dresses so you can have a co-ordinated wedding party. Do consider that styles for grown up bridesmaids won't necessarily suit young flower girls. For example, if your bridesmaids are wearing strapless gowns your flower girl could wear something similar but with straps added. One great look is to have your flower girl in the same style dress as the bridesmaids, in a lighter or darker shade of the same colour.