Adele is set to give in September.
The singer has reportedly hidden her bump from the public for months by keeping a low profile and wearing baggy clothes.
“Adele has barely left the house in recent months, so she could keep this to herself for as long as possible,” a source said.
“She stopped exercising a few months ago, and since then it’s been all about the baby. Family is very important to them and they’ve been talking about kids and getting married since they met last September. I think Adele’s still quite surprised at how quickly it happened, though.”
“She’s clearly got the usual nerves of an expectant mum, but Simon’s been amazingly reassuring, they’re both so happy.”
Reports have also claimed Adele’s boyfriend Simon Konecki is planning to propose to Adele.