A morning mix of entertainment headlines...

Prince William, arriving at King Edward VII hospital earlier today. (Dan Kitwood/GETTY IMAGES)

The staff at London’s King Edward VII hospital — the same place where Kate Middleton, aka the Duchess of Cambridge, has been staying while attempting to recover from acute morning sickness brought on by her pregnancy — has issued an apology for providing information about her condition to prank callers. Apparently two DJs at a Sydney, Australia radio station convinced staff that they were Queen Elizabeth and Prince Charles, which prompted one of the Duchess’s private nurses to share information about her condition. Hospital spokesmen said they are reviewing telephone protocols. (BBC)

Hugh Hefner and his once ex-fiance Crystal Harris are again planning to get married. And this time they are serious. Harris, 26, and the Playboy mogul, who was born in 1926, reportedly obtained the marriage license on Tuesday. According to E!, they plan to wed on New Year’s Eve. (E! Online)

Frankie Muniz was hospitalized last week after suffering from a mini-stroke. The 27-year-old tweeted that he needs to “start taking care of my body. Getting old!” It’s unclear what caused the stroke. (Associated Press; People)

This is how Ashton Kutcher looks in character as a young Steve Jobs. It’s what you might expect: Ashton Kutcher with a beard and a retro haircut. (Digital Spy)

Bruno Mars admits that he wrote the song “Locked Out of Heaven” with Halle Berry in mind. Uh, Bruno, just leave it at the song lyrics. Berry’s life is complicated enough right now. (Entertainmentwise)

Michael Richards is coming back to TV, starring opposite Kirstie Alley and Rhea Perlman in a TV Land comedy called “Giant Baby.” He will play Alley’s limo driver, who, presumably, is also a hipster doofus. (TV Column)

Matt Damon is in talks to join the cast of George Clooney’s next directorial effort, “The Monuments Men.” That cast already includes Daniel Craig, Bill Murray, Cate Blanchett, John Goodman and Jean Dujardin. (Deadline)