The long-running CW/WB series, which surpassed 300 episodes last month, will call it quits next season, Jared Padalecki, Jensen Ackles and Misha Collins announced via a video posted to Twitter this afternoon. Supernatural, the last remaining The WB series on The CW, was renewed for Season 15 in January. The final season will consist of 20 episodes. "Hey #SPNFamily here’s a little message from @JensenAckles @mishacollins and me," Padalecki tweeted. "I’m so grateful for the family that’s been built because of the show. Excuse me while i go cry." Ackles added: "Well, it’s official. One more round for the Winchester brothers. Though nothing ever really ends in Supernatural...does it?" In a statement, executive producers Robert Singer and Andrew Dabb said of ending the series: “Firstly, we would like to thank all the people who have been involved with the show both in front of and behind the camera. For us, it has been an experience of a lifetime. The support we have had from both Warner Bros Television and The CW has been incredible. We’d like to give special thanks to Jensen, Jared and Misha for making this journey so special. It is now most important to us to give these characters that we love the send off they deserve.” ALSO: Supernatural creator Eric Kripke and others react to the news: "#SPNFamily please remember: shows end. But family is forever," tweeted Kripke. "That never changes & that's what you've created here."