David Cameron welcomed a new arrival to Downing Street, posing for pictures with his 10-day-old daughter.
The Prime Minister stood with his wife Samantha, who cradled their new baby Florence Rose Endellion on the steps of No 10.
The child appeared unfazed by the bank of photographers and camera crews on the other side of the street.
Asked how many nappies he had changed, Mr Cameron joked: "Hundreds."
Another journalist asked: "Has Nick Clegg changed any nappies yet?" Mr Cameron replied: "That's next."
The baby was wearing a white shawl crocheted by a member of the public who sent it in to congratulate the couple on the birth.
The woman, Jane Fraser-Cross, from Sutton Coldfield, Birmingham, is a local fundraiser and grandmother of six, who likes to be known as "Granny Jane".
Asked if the baby was keeping them awake, Mrs Cameron smiled and replied: "Yes."
The appearance was delayed by more than 10 minutes and a Downing Street press officer said this was for "operational reasons". It was not clear if there was nappy changing involved.
Florence was born at the Royal Cornwall Hospital in Truro last Tuesday, weighing 6lb 1oz.
