We know that Kate Middleton planned to spend her 32nd birthday today "quietly," but just how low-key was the affair? E! News has the scoop on who she spent it with and what exactly went down.

"Unfortunately it seems [Prince] William was tired after his full day at Cambridge. They've stayed in and are having a meal at Kensington Palace. [Prince] Harry is with them," a source told E! News earlier today. "Carole [Middleton] was spotted at lunch time picking up food from Whole Foods. Then she went back to Kensington Palace, so Carole is with them, too."

Along with lunch at home, Carole Middleton also spent time shopping for some of her daughter's favorites.

"Carole came into London from Bucklebury for a shopping spree on the Kings Road...She spent about an hour and a half in Peter Jones where she was browsing and purchasing items from the Lancôme counter," said an insider.

As for Prince William, he had just begun his 10-week program at Cambridge University studying agricultural management, and managed to catch a train back to the Palace just before 5 p.m., according to another E! News source.

If Kate Middleton is indeed pregnant, as the current rumors suggest, her down-to-earth celebrations may make all the more sense, or perhaps the royal mother just wanted to spend her special day with the ones she loved, including her son, Prince George.

Click here to see a photo of Prince William catching the train back home after his class at Cambridge University.