Update: It turns out we didn’t have to wait long for Ghost to return to the fold. Jon’s faithful direwolf can be seen sitting quietly in the background while Jon and Sam discuss battle strategy and catch up in “A Knight of the Seven Kingdoms.”
Apparently actor John Bradley was wrong when he said he didn’t have any scenes with Ghost this season, though it’s entirely possible the wolf was added in post-production and Bradley didn’t realize Ghost was supposed to be in that scene. Hopefully Ghost will have a more substantial role in the following episode as he joins in the massive Battle of Winterfell.
The original story is below:
The Game of Thrones Season 8 premiere featured many long-awaited reunions, and a few instances of major characters meeting for the first time. But one character was conspicuous by their absence – Jon Snow’s faithful direwolf Ghost – who is, thankfully, still alive despite being missing from the show since Season 6. While it seems as if Jon’s forgotten his four-legged friend, Ghost has remained safe at home in Winterfell while his master has been traveling back and forth across Westeros.
Source: IGN.com Ghost Watch: Where Do Things Stand After Episode 2?