There’s a new member added to the British royal family!

Prince William and Kate Middleton welcomed their baby boy last night at St Mary’s Hospital in west London – where their other two children, George and Charlotte, were also born.

The couple appeared on the steps of the hospital just seven hours after Kate gave birth, and greeted hundreds of well-wishers and the media as they left the hospital.

The baby boy, who is now fifth in line to the British throne weighed 3.8kg at birth.

“Thrice the worry now,” Prince William told the reporters as he was strapping the newborn into the car seat.

He also shared that they were “very happy, very excited” and hoped “they didn’t keep them waiting for too long this time.”

The happy father also brought Prince George and Princess Charlotte to see their brother, with the latter turning and waving at the crowd of well-wishers.

The rest of the royal family have been informed and “are delighted with the news,” Kensington Palace said.

An official announcement was made by placing a notice on an easel in the forecourt of the queen’s London home – a tradition since 1837.

“My warmest congratulations to the Duke and Duchess of Cambridge on the birth of their baby boy,” Prime Minister Theresa May said. “I wish them great happiness for the future.”

The couple met at St Andrews University as students and got wed in 2011. The family now resides in Kensington Palace.