Grant Wahl's book, The Beckham Experiment, reveals how LA Galaxy star David Beckham and Hollywood actor Tom Cruise are best of friends.

The book dedicates almost an entire chapter to their friendship, revealing that Beckham often seeks Cruise's advice and some of Cruise's influence has rubbed off on him.

Apparently, Cruise was influential in Beckham moving to Los Angeles and introduced him to his PR firm and physical therapist among other things.

Beckham also admitted that the naming of his and Victoria's son Cruz, came from an obvious source.

"I must admit, when [Victoria and I] met Tom, I remember turning around to Victoria and saying, 'Cruise is a great name, but we could spell it different,'" Beckham told Wahl for the book, due from Crown Publishing on Tuesday. "And also, living in Spain, Cruz is spelled the way it is in Spanish. So that's why we got it."