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Lord Jason Lannister is the Lord of Casterly Rock and twin to Ser Tyland Lannister.[1]

Behind the scenes

On September 24, 2021, HBO announced that Jefferson Hall had signed on for House of the Dragon in the dual role of twins Jason and Tyland Lannister. Jason's character breakdown reads as follows:

"[T]he Lord of Casterly Rock and twin to Ser Tyland Lannister."
―HBO[|[src]]

In the books

This particular section contains MAJOR spoilers for House of the Dragon. Anyone wishing to avoid spoilers for the upcoming prequel series should not click [Expand].

According to Fire & Blood and The World of Ice & Fire, Lord Jason Lannister was the twin brother of Ser Tyland Lannister, and both vied for the hand of Rhaenyra Targaryen in their youth in 112 AC without successs. He fought for King Aegon II Targaryen and the Greens during the Dance of the Dragons, but was killed by Pate of Longleaf during the Battle at the Red Fork, leaving Casterly Rock in disarray and vulnerable to attack from Dalton Greyjoy and the ironborn.

See also

References

v  d  e
Lord: Jason Lannister Heir: Unknown
House-Lannister-Main-Shield.PNG
Seat: Casterly Rock Lands: The Westerlands
Title(s): Lord Paramount of the Westerlands · Lord of Casterly Rock · Warden of the West · King of the Rock (pre-War of Conquest)
Ancestors: Lann the Clever · Gerold Lannister · Tommen II Lannister · Loren Lannister
Current members: Tyland Lannister
Overlord: House Targaryen
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