French police say the man and 12-year-old boy were exploring a "dangerous, deep, snowy" mountain trail between Bossons and Les Houches.
More top news
Rob Lowe said he was "devastated" by his close friend's death.
The company is relaunching the beloved classic alongside new lines.
Once named as Britain's tallest man, the 7'7" star played Mag The Mighty in the fantasy series. He died following heart failure.