Entertainment Weekly reports that the biker drama will return to the cable network in 2011.
Creator Kurt Sutter responded to the decision on his Twitter feed, writing: "Picked up for season 4 motherf**kers! Thanks to FX for the early pickup."
Sons is the highest-rated FX series ever, attracting an average of 4.9m viewers per episode.
The third season continues on Tuesdays at 10/9c on FX and will conclude on November 30.
