Keepers at Whipsnade Zoo in Bedfordshire, England, are delighted at the arrival of baby rhino Ajang.
The name Ajang is Nepalese for 'enormous' - the calf already weighs about the same as a grown man!
That's despite only being about one metre tall.
Ajang's mum Behin has been really busy since the birth. She was a gift from the government of Asian country Nepal.
Ajang is a greater one-horned rhino. They're really endangered in the wild so his birth is good news.
Veronica Watkins from Whipsnade Zoo said: "It's great to build the population in captivity, but these animals aren't doing so well in the wild where their species is under constant threat."
There is thought to be around 2,500 greater one-horned rhinos in the wild. Ajang will grow up to weigh as much as two tonnes!