Kelly Preston has lost 39 pounds (17.7 kilograms) after giving birth to her son.
The actress, who is married to Hollywood star John Travolta, feared she would struggle to get back into shape again after falling pregnant with her third child, Benjamin, at the age of 48.
Preston has spent months working out and her hard work has finally paid off.
She tells People, "When I got pregnant at 48, I didn't know if my body would bounce back... I lost 39 pounds... I have more energy than I had 20 years ago - and I feel amazing. I'm going to be turning 50 next year - holy s**t! Hey, 50 is the new 30."
The couple is also parents to a daughter, Ella Bleu, 11. Their son Jett died in 2009.