Credit: John Shearer/

John Travolta and wife Kelly Preston are indeed expanding their family -- but with one baby, not two.

A rep for Travolta, 56, and Preston, 47, slams a new tabloid report claiming that Preston is pregnant with twins. "Totally false," the rep tells "They are not expecting twins."

On May 18, the Hollywood couple announced on their websites: "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 the our family."

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Travolta and Preston have a 10-year-old daughter, Ella Bleu. In 2009, their 16-year-old son Jett tragically died of a seizure.