The `Pulp Fiction` actor and wife Kelly Preston - with who he has 10-year-old daughter Ella - recently revealed they are expecting a new addition to their family, and admit the actress` pregnancy comes after years of trying to conceive again. John said: "We tried for several years, and we didn`t think it was going to happen for us. "This is a miracle, and we feel blessed and we are so moved by the generous outpouring of support and goodwill we`ve received from people all over the world." John, 56, and Kelly, 47, tragically lost their son 16-year-old Jett in January 2009 when he died after suffering a seizure during a family holiday to the Bahamas. Family friends insist the couple do not view their baby as a "replacement" for Jett, insisting they always planned for another child. A source said: "They can never replace him. They have always wanted to have more kids." Initially it was believed that Kelly was carrying twins, but John has since ended this speculation with a statement on his website. He wrote: "Some of the sites are saying that we are having twins. It`s a wonderful idea, but it`s untrue. We are just having one."