House sigil: A lion
House motto: Hear me roar (official); A Lannister always pays his debts (popular)
Lannisters always stick together – sometimes to an uncomfortable degree – which is why Queen Cersei, despite having married a Baratheon, appears here. Probably the most powerful family in the kingdom despite the fact that they don’t technically hold the throne, the Lannisters are equally capable of stabbing you in the back or in the front. It’s a gift.
Played by: Charles Dance
The richest man around, arguably the most ruthless and possibly the deadliest, Tywin Lannister is a major power behind the throne – partly due to the importance of his daughter, the Queen, and son, the Kingslayer, but largely, one suspects, because the entire world is scared to cross him. Do. Not. Mess.
Played by: Lena Headey
Why is Cersei listed with her family rather than her husband? Well, because she might have married Robert but – unlike Catelyn Stark, say – she never adopted his family as her own and has remained very much a Lannister at heart. Bright, ruthless in promoting her own family’s interests and clearly deeply damaged somewhere along the way, Cersei’s a formidable enemy and a near-total bitch.
Played by: Nicolaj Coster-Waldau
Imagine a paragon of knightly virtue – all strength and shining armour and dashing good looks and honour and nobility. Now take away the honour and nobility, and you’ve got the Kingslayer, Jaime Lannister. Looks good, handy with a lance and broadsword, but trust us when we say that this guy has some odd emotional hang-ups.
Played by: Peter Dinklage
A disappointment to his father merely by virtue of being born, Tyrion Lannister makes up for what he lacks in height by being really, really clever and arguably the most insightful person amid all these schemers. This dwarf is no saint, certainly, but he’s also no one to trifle with – something that other characters forget to their cost.
Played by: Eugene Simon
A cousin to the main branch of the family, Lancel acts as squire to the King. He’s a bit wet, really. You probably won't notice him much, but we mention him here because you might wonder who the drippy dude with the hair beside the King is.