Stars & Their Pets: Giuliana & Bill's Cover GirlThe Rancics play with pup Polly at a book signing in L.A. Plus: Hilary Duff's little reader and more

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BILL & GIULIANA RANCIC

And doggie makes three! The reality couple shares a cuddle with bulldog Polly on Monday at an event celebrating their first tome, I Do, Now What?, at the Grove shopping center in Los Angeles.