Jennifer Garner is reportedly still wearing her maternity clothes for "motivation".
The stunning actress and husband Ben Affleck welcomed their son Samuel into the world on February 27. The pair also have daughters Violet, six, and three-year-old Seraphina together.
Jennifer was spotted showing off her post-baby body just two weeks after giving birth last month while running errands.
A source close to the star insists Jennifer is putting her family before her post-pregnancy work-outs.
"Jennifer has had a yoga instructor at the house a couple of times, but she's not throwing herself into a hardcore gym routine yet. She does feel she's gained more weight this time around, because she was so busy with the girls that she found herself not eating healthily," a source told British magazine Closer.
"But she hasn't had time to really think about it.
"Still being in her maternity wear is her motivation, but it's only been a few weeks - it's just not a priority right now."
Jennifer has previously admitted to feeling under pressure to regain her pre-pregnancy figure. After giving birth to Seraphina, the star spoke about being unhappy about her piling on the pounds.
"I do feel pressure, but I can't seem to be pregnant without gaining 45lbs., so there's not a lot I can do about it," she said.