LeBron's Letter to Cleveland -- Read By Morgan Freeman ... Impersonator

Now, this is hilarious.

If you thought LeBron James' letter to Cleveland (explaining why he's returning to the Cavs) was dramatic before -- wait 'til you hear it read by MORGAN FREEMAN ...'s best impersonator.

Legendary celebrity impressionist Frank Caliendo (he was on the NFL on FOX for a while) went on "Mike and Mike" on ESPN2 and busted out his best "Red from Shawshank" voice for a special reading.

It's an amazing 2 minutes and 45 seconds ... and it's so good, it almost makes you wanna forgive the REAL Morgan Freeman for "Last Vegas."