Actor Tom Cruise and his wife Katie Holmes arrive for the Metropolitan Museum of Art Costume Institute Gala, "Superheroes: Fashion and Fantasy" in New York May 5, 2008. [Agencies]

Tom Cruise has had bulletproof glass fitted on all his cars. The 'Mission: Impossible' star is reportedly so worried about the safety of his wife Katie Holmes and three children he has kitted out his entire collection of vehicles with top-of-range security.

A source said: "It sounds like Tom has taken a page out of one of his action movies. A-list celebrities know they can't be too careful. Tom's vehicles look perfectly normal, but in reality they are more like armoured trucks.

He really, really loves his cars and he can afford the best." Tom has also had bombproof features included on his car and has had his drivers trained in self-defence. However, the 45-year-old actor - who has a two-year-old daughter Suri with Katie, and two adopted children, Connor and Isabella, with ex-wife Nicole Kidman - prefers to drive his cars himself whenever possible.

The source added to In Touch Weekly magazine: "Tom is a car nut. He has practical everyday cars, classic collectibles and high-powered sports cars like the Porsche 911 Turbo. Of course he loves every minute behind the wheel, but he's not stupid and he's not going to take any chances while he's driving."