Lord Frederick Windsor has welcomed his second daughter.
The 36-year-old financial analyst - who is the only son of the Prince and Princess Michael of Kent - and his wife, actress Sophie Winkleman, have confirmed the arrival of Isabella Alexandra May Windsor.
In a statement, they said: "Lord and Lady Frederick Windsor have announced the birth of their second daughter, Isabella Alexandra May Windsor.
"The baby was safely delivered at 11.59pm on 16th January 2016 at Chelsea & Westminster Hospital."
The couple - who already have daughter Maud Elizabeth Daphne Marina Windsor together - returned from the United States to the UK ahead of the birth and to celebrate Christmas in their home country.
Meanwhile, Princess Michael previously expressed her excitement for the new arrival.
She gushed: "My granddaughter was two in August and I can't wait to play with her. I'm besotted and there will be lots of games. I'm sure I'll be just as besotted with the second one."
If Isabella is anything like her father, she will be causing "chaos" in her younger days as Queen Elizabeth's grandson Peter Phillips previously revealed about Frederick.
He said: "We had a lot of fun and there was a lot of space for kids to run around in, and it wasn't just us - it was the Wales' (William and Harry), Freddie and Ella Windsor, and the Gloucesters.
"So there was quite a gang of us growing up in that age and it was a lot of fun. We caused quite a bit of mayhem and chaos but fortunately I don't think we broke too much!"