Kate Middleton due date
Kate Middleton announced her due date during a visit to the Brookhill Children's Center on March 18. Reuters

Kate Middleton announced her due date on Wednesday, quite by chance. The royal announcement didn’t come from Kensington Palace or a press conference but rather happened when a volunteer at the Brookhill Children's Center asked the visiting Duchess of Cambridge a friendly question, Us Weekly reports.

“I’m due mid-April to the end of April,” Middleton replied. “Not long to go now.”

Christine Osbourne, a Brookhill volunteer for seven years, said she just had to ask the expectant mother when she was due. "I couldn’t resist asking!" Osbourne said. "It’s very exciting – and it was wonderful to have her here.”

The late-April due date isn’t surprising to many fans of the British royals. If the Duchess were very close to giving birth, she wouldn’t be participating in so many events. Recently, Kate has been seen on the set of PBS' “Downton Abbey” and thanking military personnel on St. Patrick’s Day. Prince William’s wife is so busy that she forgets she’s carrying her second child, even when she’s running after son George, now 1 1/2.

“I sometimes forget I'm pregnant,” Kate allegedly told an attendee while she was at an event for the Turner Contemporary Gallery earlier this month, E! Online reports.

While royal watchers now have a more specific due date, the baby’s gender is still a secret. As previously reported, palace insiders have said that the baby is rumored to be a girl who will be named Diana, after William's late mother, but nothing has been confirmed yet. The baby’s gender likely won’t be confirmed until he or she is born.