Preston reveals Travolta marriage secret

Kelly Preston credits her "normal" family life for the success of her marriage to John Travolta.

The couple tied the knot 17 years ago and have 16-year-old son Jett and daughter Ella, eight.

The actress told US TV show Extra that the family lives a fairly ordinary life outside the Hollywood spotlight.

She said: "We don't really live in LA - we live in Florida. We've got our kids, do a lot of very normal things... ride golf carts, swim, rollerblade. We try to keep the family together as much as humanly possible."

She also insisted that she is not concerned about the film industry's effect on Ella, who stars with her parents in upcoming movie Old Dogs.

She said: "It's all about choices, about instilling values. We don't do drugs. I don't drink, so she's not around a lot of that, so I don't think she'll be as tempted to fall into that."