TBS announced at its upfront presentation on Wednesday that the red-haired comedian would continue to host Conan through 2018.
"Over the past four years, we have built a terrific relationship with Conan O'Brien and are thrilled to be extending his series for another three years," TBS president Michael Wright said in a statement.
"Conan has not only brought an incredibly young audience to TBS but has also created a digital presence that draws millions of fans to his unique brand of comedy," Wright said.
Conan debuted back in 2010. He left NBC on bitter terms after the network decided to bring Jay Leno back to late night.