A rare Amazonian cactus that's attracted interest from around the world has started to bloom in the UK for the first time - in Cambridge.
The moonflower's growing at the Cambridge University Botanic Garden.
Thousands of people have viewed a webcam to watch it flower. Experts kept a night watch throughout the week so that they did not miss the flowering of Selenicereus wittii - an event which begins at sunset and is over by sunrise.
The Moonflower actually bloomed earlier on Saturday afternoon at around 3pm, and the garden said it was 28cm long.
It happens just once for 12 hours.