Kate, 31, has been on pregnancy watch since she and Prince William, 30, tied the knot in April 2011.
“They’re planning to make an announcement in December. William and Kate are focused on starting a family,” Australia-based New Idea magazine quoted Jessica Hay, a former roommate of Kate, as saying.
Hay told the magazine that the future King and Queen of England are pretty far along in baby planning.
“It seems very traditional, but of course they’ll be happy with boys or two girls, they don’t want more.
“They’ve discussed it endlessly and don’t want to be older parents,” she explained.
According to the paper, the couple postponed baby plans due to their high-profile engagements throughout the year, including the Queen’s Diamond Jubilee and the London Olympics.