John Travolta, Kelly Preston

John Travolta and Kelly Preston are expecting.

"It's impossible to keep a secret ... especially one as wonderful as this," they announced on their website. "We want to be the first to share this great news with everyone that we are expecting a new addition to our family. Love, John, Kelly and Ella."

John Travolta and Kelly Preston's Son, Jett, Dies at 16

Travolta, 56, and Preston, 47, lost their son Jett when he died of a seizure in 2009. They have a 10-year-old daughter named Ella Bleu.