- DAARIO NAHARIS: In Season 3, the role of Daenerys's lover was played by Ed Skrein. Starting in Season 4, this role was played by Michiel Huisman. Skrein's departure from the series was due to his work on the film "The Transporter: Reloaded."
- THREE-EYED RAVEN: The role of the Three-Eyed Raven was originally played by Struan Rodger, but we never saw him up close. In season five, the role was taken by Academy Award nominee Max von Sydow, which greatly excited fans.
- TOMMEN BARATHEON: In the first two seasons, Cersei's son was played by Callum Wharry. When the role was extended in seasons four and five, it was decided to replace the boy with an older, more experienced actor, choosing Dean-Charles Chapman.
BERIC DONDARRION: Australian actor David Michael Scott played the role of Beric in one of the scenes in the first season. He was replaced by Richard Dormer in season 3. The reason for his replacement was not officially announced.
SELYSE BARATHEON: We only saw Sarah MacKeever as Stannis Baratheon's wife in a single scene in Season 2. Later, when Selyse was "promoted" to the main cast, the actress was replaced by Tara Fitzgerald.
- DICKON DARLEY: Freddie Stroma played Dickon in Season 6 and was set to continue. However, as the actor was also appearing in the series "Time After Time," he had to leave the series, and Tom Hopper became the new face of House Tarly.
- MYRCELLA BARATHEON: Initially, the role of Myrcella was played by Irish actress Aimee Richardson. Her character subsequently disappeared for two seasons. In Season 5, the role was passed on to Nell Tiger Free for the same reason Tommen was replaced.
- RICKARD KARSTARK: The Lord of Kar Hold made an appearance in the first installment of the series, played by Steven Blount. This character reappeared in the second and third installments, this time played by John Stahl.
- THE MOUNTAIN: The Mountain has been played by three actors. In the first season, it was actor Conan Stevens, who went on to star in the film "The Hobbit." In the second, he was replaced by Ian Whyte. Since the fourth, he has been played by athlete Hafþór Júlíus Björnsson.
- THE NIGHT KING: In seasons 4 and 5, he was played by Richard Brake. He was the one who turned Craster's son into a White Walker and was in charge of the army at Hardhouse. Starting in season 6, he is played by Slovak actor Vladimir Furdik.
