The UK's Princess Eugenie, granddaughter of Queen Elizabeth II and the Duke of Edinburgh, gave birth to a boy on Tuesday.
Her husband, Jack Brooksbank, was present at the birth, and the royal family said the princess and her 3.6-kilogram baby were doing well.
The royal family confirmed the birth on Twitter and Eugenie released a black-and-white image on Instagram.
The baby's name has not yet been made public. He was born at London's Portland Hospital.
The boy is Eugenie and Mr Brooksbank’s first child – and a first grandchild for the Duke of York and Sarah, Duchess of York.
The baby is the ninth great-grandchild of Queen Elizabeth and the Duke of Edinburgh and 11th in line to the throne.
The couple married at St George's Chapel at Windsor Castle in October 2018 Eugenie also announced her pregnancy on Instagram with a photo of a pair of baby slippers.
The birth is a welcome bit of good news for the monarch after a couple of days to forget.
On Sunday it was revealed that in 1979 she had lobbied the UK government to amend a draft law to conceal the full extent of her wealth.
On Monday, she was criticised for driving up the price of renewables by using an auction system to lease parts of the crown-owned UK seabed for wind farm licences .
The Queen's other great grandchildren Prince George of Cambridge, the son of Prince William and Kate Middleton, and third in the line of succession to the British throne. Born in July 2013. Getty Images
Princess Charlotte of Cambridge, the daughter of Prince William and Kate Middleton, and fourth in the line of succession to the British throne. Born in May 2015. Getty Images
Prince Louis of Cambridge, the son of Prince William and Kate Middleton, and fifth in the line of succession to the British throne. Born in April 2018. Getty Images
Archie Harrison Mountbatten-Windsor, the son of Prince Harry and Meghan Markle, and seventh in the line of succession to the British throne. Born in May 2019. Getty Images
Megan Markle and Prince Harry had their second child, Lilibet Diana Mountbatten-Windsor, in June this year. Reuters
Princess Eugenie and her husband Jack Brooksbank have welcomed a baby boy, August Philip Hawke Brooksbank, in February 2021. AP Photo
Savannah Phillips, the daughter of Peter Phillips and Autumn Phillips. Born in December 2010. Getty Images
Isla Phillips, left - seen here with her sister Savannah Phillips, the daughter of Peter Phillips and Autumn Phillips. Born in March 2012. Getty Images
Mia Grace Tindall, the daughter of Zara Tindall and Mike Tindall. Born in January 2014. Getty Images
Lena Elizabeth Tindall, the daughter of Zara Tindall and Mike Tindall. Born in June 2018. Getty Images
Updated: February 10, 2021, 11:39 AM