"Isn't Preston married to John Travolta?" Kind of like Tom Cruise is "married" to Katie Holmes.
I think they are actually married, and have been for around 10 years. I just checked Wikipedia. Preston has been married to John Travolta since 1991.
Where do you get your information. Obviously not from your brain. Tom Cruise and Katie Holmes are not "married". Do your homework before making an idiot of yourself.