Credit: Sax Rohmer/Splash News Online

Bump watch!

Kelly Preston, 47, debuted her growing belly in South Africa Thursday morning.

John Travolta, 56, piloted the jet — named Jett Clipper Ella, after his son, who died in January 2009 of a seizure, and daughter Ella Blue, 10 -- that took the family to watch the World Cup, which kicks off this weekend. The UK Daily Mail reports Preston -- who is due this fall -- looked happy and relaxed when they landed.

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Travolta is a goodwill ambassador for Qantas Airlines, which sponsors the Australian Socceroos team.

He is scheduled to give a pep talk to the team before they play a Sunday match, the newspaper reports. The family will spend five days in the African nation.

Preston's mom Linda Carlson expressed her joy about the pregnancy to on Tuesday.

"We are over the moon," she told Us, "I've been praying that this would happen, especially since Jett's death."

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Continued Carlson, "It couldn't come at a better time. Her aura is so filled with peace. It's changed their lives."