Ali Larter son Coldwater Park

While some A-list moms are still struggling to ditch the baby weight, Ali Larter looks like she's in the best shape of her life after giving birth to baby Theodore MacArthur!

The Heroes star showed off her perfect legs in sexy cut-off shorts while on an outing at Coldwater Park with her 17-month-old son, on Saturday afternoon, and there's no doubt she was the hottest mamma on the playground!

The 36-year-old mom of one is getting in as much time with her little man as possible, because she's gearing up start work on the upcoming Fox series The Asset, in which she'll play a globe-trotting human intelligence specialist!