Jessica Simpson wants to get back in shape

ew mother Jessica Simpson is putting in her best efforts to get her pre-baby body back, and is excited about the expected transformation.

In late May, the 31-year-old designer startedWeight Watchers - for which she's a spokesperson - and has been focused on losing weight gradually

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"She understands it's a process," People magazine quoted a friend of Simpson as saying.

The source added that the star is "working very hard and she's excited."

A representative for the weight-loss company vehemently denied rumours that there's a deadline for her to lose her post-baby bulge.

"Weight Watchers is in it for the long haul," a spokesperson said.

"We're with her 100 percent as she develops a whole new relationship with food and activity," the spokesperson added.