- Josef Altin as Pyp. Pyp was left behind at Castle Black when the rangers traveled beyond the Wall in season 2.
- Luke McEwan as Rast, the Night’s Watchman who antagonized Jon Snow and Samwell in the first season.
- Ian McElhinney, as Ser Barristan Selmy, the dismissed Lord Commander of the Kingsguard.
A Brazilian interview with Lino Facioli, the child actor who plays Robin Arryn, led some to conclude he was definitely returning in season 3. However, the article is unclear. It mentions Robin appearing in season 3, but the statement appears to be based on the character being in A Storm of Swords. Given that the novel is being split into two seasons, it’s not certain whether we’ll see him in next year or in season 4. Kate Dickie, who plays Lady Lysa Arryn, has not been confirmed yet as being in season 3, and we’re unlikely to see Robin without his mother.
UPDATE: SweetSigma was kind enough to let us know Kate Dickie‘s agent has confirmed that the actress will be returning in September to film scenes as Lysa Arryn. If Dickie is in, then Facioli most likely is, after all! Very interesting info, considering many thought we would not see the Eyrie again until season 4.
Clive Mantle, who plays the Greatjon, has been confirmed as not returning to the show for the third season.
It is not yet known whether David Bradley will be returning as Lord Walder Frey, or if other first-season Night’s Watch characters such as Maester Aemon and Ser Alliser Thorne will be appearing.
Ours is the Fury: Altin mentioned on Twitter that he would start filming in September, but McEwan tweeted that he had already been filming, and so I believe Rast has been added to the Night’s Watch group led by Mormont, traveling beyond the Wall.