The actors will get back into character as Inspector Robbie Lewis and his partner DS Hathaway for four new episodes, due to be filmed in July.
The new commission of the drama comes after series three, which was broadcast this spring, attracted seven million viewers, the channel said.
The series, an ITV Studios production, is produced by Chris Burt who has been at the helm of all 12 episodes since its launch in 2006. The executive producers are Michele Buck and Damien Timmer.
Sally Haynes, ITV's controller of drama commissioning, said: "Lewis is always one of the highlights of the year on ITV1 and features not only a great partnership between Lewis and Hathaway but some great plot lines and twists that keep the audience gripped. I'm thrilled it's returning and I know our viewers will be too."Read more
A spin-off of the popular series Inspector Morse, a special two-hour drama picked up five years after the series ended.
Kevin Whately returned as Lewis after working overseas in the Virgin Islands. Partnered with Hathaway, a young Cambridge graduate fast-tracked through the police, Lewis is once more investigating in Morse's old stomping ground of Oxford. Echoes of Morse follow his investigations as Lewis lends his own to proceedings. A full series followed.
While both Lewis and Hathaway left the police force at the end of season 7, ITV confirmed in 2014 that an eighth series had been commissioned. Lewis retired for good at the end of the ninth and final series.moreless