Kate Middleton Fuller Figure: Pregnant?

Kate Middleton has spurred another round of pregnancy rumors after attending the National Portrait Gallery exhibit in London Thursday.

The Duchess of Cambridge wore a slightly form-fitting electric blue dress by Stella McCartney to the exhibition of athlete portraits, entitled "Road to 2012: Aiming High."

Perhaps it was the shape of the fashion-forward '60's inspired frock at the Olympic-inspired event, but many reports have indicated that Middleton appeared to be pregnant due to a seeming increase in her bust size.

Rumors that Kate and her husband Prince William are starting a family have swirled since after their marriage last year.

Well known for her athletic, slender shape, the Duchess will surely display early signs of pregnancy if she and her husband so choose to start a family.

Early on, Middleton addressed the public's questions about what she wants in the future.

"I hope we will be able to have a happy family ourselves," said the Duchess in an interview with ITN at the time of her engagement announcement.

"I think we'll take it one step at a time," added Prince William. "We'll sort of get over the marriage first and then maybe look at the kids. But obviously we want a family so we'll have to start thinking about that."

Most recently, reports claim that Middleton has a name picked out for a baby girl.

Additionally, Queen Elizabeth II is reportedly pressuring the couple to have an heir to the throne.

Not only is the Duchess of Cambridge frequently scrutinized for her personal life, but the Duchess has cemented herself as one of today's fashion icons.

Earlier this month, Middleton watched as Prince William was officially installed as a member of the Order of the Thistle in Scotland as a knight. The Duchess made headlines for her soft yellow coat which was custom-made.