She wrote: "Im delighted to announce that Simon and I are expecting our first child together.
"I wanted you to hear the news direct from me, obviously we’re over the moon and very excited but please respect our privacy at this precious time. Yours always, Adele xx."
A source previously told The Daily Star that the 24-year old was planning to get pregnant by the end of this year, telling the tabloid in March: "[Adele] told Simon how broody she's been feeling. The pair have spoken about children and it's something they both very much want in the future.
"Simon already has a five-year-old daughter from his previous marriage with Clary, who Adele has met and absolutely adore."
They added that Adele already has a list of names she loves, stating: "It's a huge turnaround for Adele who’s always said she wants to wait until she’s at least 30 and has five albums before she thinks about a family. But now they have their big pad in the country with ample bedrooms, she’s keen to fill it with babies."