[codegeek]

Out of these, Vin Diesel is the only one who has full head of hair but still shaves it. The rest do it because they are all bald. Just my observation :)

[pchivers]

Vin Diesel is definitely balding. You can see it very clearly in xXx.

[codegeek]

may be more recently. But certainly not as much as willis, stathom etc.