Twins for Prince William and Duchess Kate Middleton!

Kate Middleton, the Duchess of Cambridge, glowed as she entered the lavish dinner thrown for her and her husband, Prince William, by the rulers of Malaysia. She wore a white floor-length Alexander McQueen gown embellished with golden flowers, and onlookers commented about how beautiful, healthy and happy the duchess looked.

OK! GALLERY: PRINCE WILLIAM AND KATE MIDDLETON VISIT SINGAPORE FOR THE QUEEN'S DIAMOND JUBILEE TOUR

A friend of the royal couple says that there is a very specific, though secret, reason for Kate’s special glow: It’s baby time!

“It’s been all systems go” since William returned home in March from six weeks of military duty in the Falkland Islands, says the friend. “They have had a lot of baby-making time together.”

OK! GALLERY: KATE MIDDLETON GLITTERS IN GOLD DRESS AT STATE DINNER IN MALAYSIA

But the royal couple could be in for twice the nappies: During the official visit to Asia, William told a fan that they were “thinking about having two.”