John Travolta has rushed home from a promotional trip in Australia after receiving word that pregnant wife Kelly Preston has gone into labor.

The 56-year-old Grease star was due in Perth for a charity event but abruptly cancelled to pilot his own flight back to the United States.

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Travolta made good on his promise that if his Preston "goes into labour, I'll have to take the plane straight back on a 22-hour flight''.

"If I get a call, I may have to say adios," he told reporters earlier this week.

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Preston, 47, wasn't expected to give birth to the couple's third child for another three weeks.

The couple has already named their much anticipated baby boy Benjamin.

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John Travolta and wife Kelly Preston have been keeping silent about their joyous pregnancy, and RadarOnline.com has learned the superstar couple could be even quieter at the birth.

While Hollywood awaits the Travolta's baby, that is expected to be delivered imminently, the one thing for certain already is that the pair's religious faith will play a major role.

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Travolta and Preston are both members of the Church of Scientology and are likely to follow the group's 'silent birth' guidelines when Preston finally does go into labor.