Sources close to the situation claim Travolta was a no-show at his fellow Scientologist's wedding last weekend to actress Katie Holmes, because Cruise had left talk show host Oprah Winfrey off the guest list, TMZ.com reported.
Travolta and Winfrey have enjoyed a long friendship, to the point that the talk show icon organized the "Pulp Fiction" actor's 50th birthday party.
The Web site said that while Travolta and fellow Scientologist actress Kirstie Alley skipped the event, several noted followers were in attendance -- including David Miscavige, the head of the Church of Scientology, who was Cruise's best man for the wedding.
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