Flair was out in NYC with his daughter, WWE Divas Champion Charlotte, (he's super proud of her accomplishments btw) -- when we asked if there was one celeb he'd consider a pro wrestling superfan.
The answer -- LeBron!!
Flair says James has been a huge fan for decades and once gave him one of the best compliments he's EVER received!
Check out this clip of Flair in his prime ... Bron's right.