When Kelly Preston was ready to drop the baby weight in the months after the birth of son Benjamin Travolta in November 2010, she turned to Kirstie Alley.
Kelly, 49, revealed to People she used the weight-loss program Kirstie , 60, developed - The Organic Liaison - to firm her figure.
"I lost 39 lbs., have more energy than I had 20 years ago - and I feel amazing," the actress told the mag. "I'm going to be turning 50 next year - holy s***! Hey, 50 is the new 30."
Kelly, who gave birth to Benjamin -- her son with John Travolta -- when she was in her late 40s, admitted she wasn't sure she'd be able to get back in shape.
"When I got pregnant at 48, I didn't know if my body would bounce back," she said.
But it did and it appears Kelly's success has already landed her a new gig - she's now the spokesperson for Kirstie's program.