It is believed the 24-year-old and her boyfriend Simon Konecki became parents last week.
The couple announced they were expecting their first child together in June. Adele told fans she was "thrilled" by the prospect of being a mum.
Charity worker Simon, who has a five-year-old daughter with his ex-wife, lives with Adele in Sussex.
Congrats Congrats Congrats!!! I hope he has an amazing voice like you as well
