Hoster Tully

Lord Hoster Tully is a character in Game of Thrones. The role has not yet been cast and was cut from the the second season. Hoster Tully is the Lord of Riverrun and the the head of House Tully, one of the Great Houses of Westeros. He is the father of Edmure, Catelyn and Lysa. He rules over the Riverlands from the castle of Riverrun.

Background
Hoster is the head of House Tully and the Lord Paramount of the Riverlands. The Riverlands are one of the constituent regions of the Seven Kingdoms and House Tully is one of the Great Houses of the realm. House Tully rule the region from their seat at Riverrun and Hoster also holds the title Lord of Riverrun.

Hoster married Lady Minisa of House Whent. They have three children, two daughters Catelyn and Lysa and a son, Edmure. Tytos brokered a marriage alliance with the Lords Paramount of the North House Stark, betrothing his eldest daughter Catelyn to their heir Brandon Stark. The Mad King Aerys II Targaryen had Brandon executed triggering a rebellion. Hoster joined House Stark, House Baratheon and House Arryn in opposing the Mad King. Catelyn married Brandon's brother Eddard Stark and Hoster arranged for Lysa to marry Lord Jon Arryn to solidify the alliance. They won the war and installed Robert Baratheon as the King on the Iron Throne. Hoster has become old and frail and his son Edmure now rules in his place.

In the books
In the Song of Ice and Fire novels Hoster is an old, spent man close to the end of his life. In his prime he was a canny politician and effective military commander, and was a vital supporter of Robert Baratheon's uprising against the Targaryen dynasty. He was married to Lady Minisa Whent, of the great castle of Harrenhal, who passed away some years before the events of the series begin.

In the novels Hoster has a brother, Brynden Tully, the 'Blackfish', who was cut from the first season. HBO have not yet confirmed whether he will be appearing later in the series.