According to People.com:

“We tried for several years, and we didn’t think it was going to happen for us,” the couple tell PEOPLE in an exclusive story in this week’s issue.

Their daughter Ella Bleu, 10, also reacted with joy. “This is a miracle, and we feel blessed,” Travolta, 56, and Preston, 47, say.

Those close to the family, meanwhile, denounce speculation the couple are trying to “replace” son Jett, who died last year at age 16, with a new baby. A family friend says, “They can never replace him” and that the couple “always wanted to have more kids.”

Meanwhile, Nick Cannon denies his wife Mariah is pregnant via his Twitter page.