John Travolta Kelly Preston ExpectingThe new cover of Star reports that John Travolta and 47-year-old Kelly Preston are expecting a child. "Kelly is about three months pregnant," a source told the magazine for their cover story. "Both she and John are absolutely over the moon."

Now, the family confirms the news on Travolta's official Web site. "It's impossible to keep a secret ... especially one as wonderful as this. 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"

If Preston is indeed three months pregnant as the source says, she would likely be due in November.

Travolta and Preston wed in 1991 and had two children, daughter Ella Bleu, born in 2000, and their late son Jett, who died in 2009 at age 16. Jett, who had a history of seizures, died on January 2 last year while at the Travoltas' residence in the Bahamas. Both John Travolta and Kelly Preston have kept low profiles since his death.

Preston had spoken to PEOPLE back in 2007 about her desire for a third child. "I thought I would get pregnant when Ella was about 4," she said in August of 2007. "Then I wanted to work a little bit more, and all of a sudden she's 7. I'm not pregnant now, but I don't have another movie project [lined up]; that's all I'll say."

John Travolta Pregnant on John Travolta's official Web Site