We're currently coveting this delicate-looking houseplant.
The Senecio rowleyanus, more commonly known as the string of pearls, is a trailing succulent that thrives in bright indirect light and dry conditions. The plant's "pearls" store water - so we recommend letting potting soil dry out completely in-between waterings. It makes for a great hanging plant, just make sure to avoid drafty conditions and cold air.
Fun Fact: the leaves (or 'pearls') are round to reduce the surface area exposed to the hot sun and dry air, thus minimizing the loss of water through evaporation.