Kelly Preston has spoken about her victory over losing her baby weight.

The 49-year-old actress gave birth to baby son Benjamin last November and said she did not know how her body would react to pregnancy later in life.

But Kelly, who is married to Hollywood star John Travolta, told People magazine that everything went better than she expected.

"When I got pregnant at 48, I didn't know if my body would bounce back," she revealed.

But Kelly has admitted that not only has she lost the pounds, she is actually lighter than when she got pregnant.

"I lost 39lbs, have more energy than I had 20 years ago and I feel amazing," Kelly gushed. "I'm going to be turning 50 next year holy s**t! Hey, 50 is the new 30."

Aside from playing tennis and keeping up with an active baby and her 11-year-old daughter, Ella Bleu, Kelly says she has been using Kirstie Alley's weight loss programme by The Organic Liaison.

"I was so excited when my best friend created Rescue Me," Kelly shared of the supplement system that targets cravings. "It's pretty much the most genius thing ever."

Kelly's first son Jett died nearly two years ago after suffering a seizure.