First Minister Carwyn Jones has led Welsh messages of congratulations to the Duke and Duchess of Cambridge.
"Many congratulations to the Duke and Duchess of Cambridge on their wonderful news" he tweeted.
The Leader of the Welsh Conservatives in the Assembly, Andrew RT Davies, also tweeted a message of support, describing the news as "the perfect end to a Jubilee year.
More top news
Matthew Scully-Hicks, 31, pleaded not guilty to the murder charge at Cardiff Crown Court.
With heavy rain forecast for tonight, why not stay in and join us for Episode 2 of Coast and Country? We're celebrating the Welsh winter!
Doris has been and gone, and today is a different day altogether! Calm and settled, ahead of a wet weekend!