05/26/2010 09:28 am ET Updated May 25, 2011

John Travolta & Kelly Preston Having TWINS?

Their rep denied they are expecting twins.

John Travolta and Kelly Preston are expecting twin boys, Star magazine claims.

"They were ecstatic when they thought they were having just one baby," a source said. "Now that there will be two, they can barely contain their happiness!"

The source added that Kelly, 47, conceived the twins through in vitro fertilization.

The couple confirmed they were expecting "a new addition" in a statement last week. They are the parents of Ella, 10, and Jett, who died last year at 16.

The Church of Scientology calls for a silent birth, and Jett and Ella were born that way. But twins are often delivered via scheduled c-section, and if that is the case Kelly may be able to opt for an epidural.