London (CNN) UK Prime Minister Boris Johnson is set for an unusually busy few months in office.

The 55-year-old and his fiancée Carrie Symonds , 32, welcomed a baby boy on Wednesday morning, a spokesperson for the "thrilled" couple announced.

The child was born at a London hospital, the spokesperson said, adding that mother and baby are doing very well.

"The PM and Ms Symonds would like to thank the fantastic NHS maternity team," the spokesperson said.

Figures from across the British political spectrum congratulated the couple after the news emerged.