Michael Gandolfini -- I Haven't Finished Watching 'The Sopranos'

James Gandolfini's son was too young to watch "The Sopranos" while it was on, but even though he's now a mature 14 ... he hasn't finished the series.

Michael Gandolfini told our photog he wasn't allowed to watch his father's most famous work, but he's seen some of it now ... but not the infamous ending.