A 27-year-old woman has died after plummeting from a cliff edge in Sydney's eastern suburbs onto the rocks below.

Police were called to Diamond Bay Reserve in Vaucluse, a popular tourist and selfie spot, at about 11.20am on Saturday after reports someone had fallen from the cliff which overlooks the ocean.

The photo spot at Diamond Bay. Credit:Wolter Peeters

Witnesses said the woman appeared to be taking photos when she fell about 30 metres, police said.

The victim is believed to be from Sydney but has not yet been formally identified.