The Seven Sisters are a series of chalk cliffs by the English Channel. They form part of the South Downs in East Sussex, between the towns of Seaford and Eastbourne in southern England. They are within the South Downs National Park which is bounded by the coast, the Cuckmere and the A259 road. They are the remnants of dry valleys in the chalk South Downs, which are gradually being eroded by the sea.
From west to east, the sequence starts just east of Cuckmere Haven. The cliff peaks and the dips between them are individually named. Listed below, the peaks are in italics. There are seven hills, with an eighth one being created by the erosion of the sea.
The South Downs Way runs along the edge of the cliffs, taking a very undulating course. Many landmarks around the area are named after the cliffs, including the Seven Sisters Sheep Centre.