Less than a month after giving birth, Jessica Alba has shed all her extra weight.

The Fantastic Four star appeared to have regained her figure as she spent the afternoon shopping in Beverly Hills yesterday.

Dressed casually in tracksuit bottoms and flip-flops, the actress did however seem to be having problems with her back as she stopped for a stretch.

Slimline: Jessica Alba is back to her pre-pregnancy figure less than a month after giving birth

The 27-year-old, who married her long-time boyfriend Cash Warren three weeks ago, delivered her first child, Honor Marie Warren, at the Cedars-Sinai Medical Center in Los Angeles at the beginning of the month.

Alba's father was overheard saying 'she's beautiful', while Warren was seen carrying food into the maternity ward, sources told US Weekly magazine.

Alba has previously vowed to be a tough mother.

The actress appeared to be suffering with her back on the shopping trip in Beverly Hills

She has said: "I don't want to be my child's best friend; I want to be a mom. But I do want my child to come to me when they have problems and need to talk, so it's going to be about treading that line."

Alba met Warren, 29, on the set of Fantastic Four in 2004 where he was a director's assistant. Warren has since moved into producing.

The couple married in a quiet ceremony at the Beverly Hills courthouse on May 19.

Alba was dressed casually in a flowing blue dress and a ponytail, and sources say that aside from courthouse staff, no one else was present at the ceremony.

Swell: Jessica during her pregnancy