"I'm delighted to announce that Simon and I are expecting our first child together," Adele said in a posting under the heading, "I've Got Some News."
"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"
The singer-songwriter did not say when she is due to give birth or what the baby's gender is.
People.com said Adele, 24, was first photographed with boyfriend Simon Konecki, 38, in January.