It's official ... Charlie Sheen will be the next "roastee" at the next Comedy Central Roast in September.

Sheen released a statement saying, "You could say I've been providing kindling for this Roast for a while ... It's time to light it up.& It's going to be epic."

The Roast will be taped in Los Angeles on September 10 ... and it will air on Comedy Central on September 19 -- which is, not coincidentally, the same night the revamped "Two and a Half Men" is set to premiere.

A rep for Comedy Central says, "Charlie has assured us that nothing will be off limits in this Roast which scares even us."