The former Kate Middleton stepped out with Queen Elizabeth II on Wednesday to celebrate 150 years of London's Underground trains at the Baker Street Station. And the pregnant Duchess of Cambridge received a "baby on board" pin to boot.
The Queen's husband, Prince Philip, the Duke of Edinburgh, also attended the event. The Queen is said to have looked "happy and healthy" after battling symptoms of gastroenteritis. The 86-year-old monarch had to miss a handful of royal engagements because of her illness. She was released from the hospital March 4.
The royals viewed a restored Tube cart from 1892 and the monarch was honored with a plaque on the S7 train, which christened it Queen Elizabeth II, according to Metro.
The London Underground's chief operating officer presented Catherine, the Duchess of Cambridge, with a "baby on board" pin, which is meant for expectant mothers onboard the "choob" to signal passengers to give them priority seating. It also "saves men the embarrassment of having to guess if a woman is pregnant," he said.