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It may have taken 13 seasons but Jensen Ackles is finally going to play someone other than Dean Winchester on Supernatural. Unlike Jared Padalecki, who has stepped into several different roles throughout the course of the show, this is the first time we're going see Ackles slip into someone else's skin — which is a big deal.

And while we don't know much about who he might be playing or any of the circumstances surrounding the major switch, it looks like this new character is going to be a game changer for the show, and someone fans probably aren't expecting.

"It's a bold choice for us but I think it's really going to pay off," executive producer Andrew Dabb tells TV Guide. Added executive producer Robert Singer, "We're talking about a season-ender."

Wait, what? If they're waiting until the end of the season to pull off this major character switch, it's a pretty good sign that we're in for something special. Keep your eyes peeled, this one's going to be huge.

Supernatural's Season 13 finale will air Thursday, May 17 at 8/7c on the CW.

(Full Disclosure: TV Guide is owned by CBS, The CW's parent company.)

Jensen Ackles, SupernaturalJensen Ackles, Supernatural