Tovey and Solemani play young lovers Steve and Becky, who are constantly interrupted in their desire for peaceful slovenliness by a stream of uninvited neighbours and relatives.
Writer Stefan Golaszewski says: "After three series in Steve and Becky's bedsit, we're moving them into the outside world as we reach the final chapter of their story. It's been a great few years and I feel incredibly lucky to have worked with such a talented team."
Kenton Allen, CEO of production company Big Talk, added: "Stefan's brilliant dissection of young love and all the problems that come with it have given us four series of perfectly realised writing, acting and technical achievement. We're so proud of Him & Her and think it will stand the ultimate test of time and I can't wait for audiences to join Steve and Becky to witness the wedding of Laura, one of the most appalling characters on television for a very long time."
Series 3 saw Steve and Becky themselves become engaged, before leaving viewers on a cliffhanger as to whether Paul had begun a homosexual affair and would be leaving his monstrous female fiancée.
The following Series 3 clip features Laura teaching Paul some manners: