The royal wore the stylish shift for a visit to an inner-city London children's center
Credit: Beretta/Sims/Rex USA

She may be royalty, but Princess Kate‘s not afraid to live on a budget.

With just a month to go before she welcomes her second child, the mom, 33, stepped out on Wednesday in a $63 polka-dot maternity dress from the online retailer ASOS.

She wore the stylish shift for a visit to Brookhill Children’s Centre in London’s Woolwich, her second outing in as many days after joining husband Prince William for the annual St. Patrick’s Day parade in Aldershot on Tuesday.

While at the children’s centre, she gave something of a clue about her due date. Asked by volunteer Christine Osborne, 49, when the country could expect the sibling for Prince George, the royal mother-to-be said, “I’m due mid-April, to the end of April. Not long to go now.”

“I couldn’t resist asking,” Christine, a grandmother who has worked for the charity for seven years, told reporters. “It’s very exciting – and was wonderful to have her here.”

As she left, the royal mother-to-be was given some useful gifts. “Oh that’s perfect,” she said with a laugh as she looked one of them: a potty-training book.