Kate Middleton: Spotted at Starbucks!

Duchess of Cambridge Kate Middleton has been laying very low since announcing she is pregnant, but not so low that she's cut out her morning Starbucks run.

With little fanfare, she exited Kensington Palace for a very hush-hush walk through Kensington Gardens with dog Lupo followed by a trip to the coffee chain!

Escorted by a security guard, the 31-year-old Duchess "looked beautiful," according to an onlooker ... to the surprise of pretty much no one on Earth.

"Her hair was done nicely and she had a scarf, lovely long coat and boots on ... she was wrapped up warm, so I couldn't see the bump," the observer adds.

It's unclear just how much she's showing at this stage, but don't expect a lot of splashy celebrity gossip magazine photo shoots or Instagram updates.

Anyway, as the security guard waited outside with Lupo, Prince William's wife went inside and placed her order herself: Her decaf drink, plus a cookie.

Thus armed with provisions, the expectant royal took Lupo's leash back from the security guard (the pooch is "so cute and well-behaved," the spy says), and carried on.

"She's a regular," a Starbucks staffer says of the Duchess.

"Kate was smiling," the observer continues. Sadly, no Kate Middleton photos were taken, but she "paid with a Starbucks card, which she swiped herself."

Royals. They're just like us.