Sandra Bullock is piling on the pounds, setting off rumors she’s expecting her first child.

As our magazine’s exclusive photo shows, Bullock, 41, was sporting a plumper-than-usual belly October 9 as she kissed and cuddled with her new husband, Jesse James, 35, while frolicking on the beach at their Orange County, Calif., home.

In an interview last year, the Miss Congeniality star spoke about one day starting a family, saying: ‘If I did [have kids], my entire life would shift. I would no longer [act].”

Bullock and Monster Garage star James met in December 2003 and were married in a secret sunset ceremony under a white circus-style tent near Santa Barbara in July.

The couple — who arrived for the nuptials in a bright red monster truck — invited several hundred of their closest friends and family, including William Shatner, who starred in Miss Congeniality with Bullock.

Sandra walked down the aisle to a taped aria of her late mother singing Bellini’s Casta Diva.

When contacted by The National Enquirer, Bullock’s publicist Cheryl Maisel denied that the star is pregnant — but didn’t explain the bulge!