Cersei Lannister, aka Lena Headey played a mean game of 'Insult War' with Jimmy Kimmel last night.

The Game of Thrones actress did her best to take down the chat show host in a hilarious drunken insult war.

"No one drinks a goblet of wine like you do on Game of Thrones," Kimmel said before pulling out a decanter of wine and two goblets and challenging the actress.

Headey started with, "That's a lovely tie. It's such a shame it's around a worthless neck”.

"Thank you for coming today, I know you have a busy schedule doing sex with your brother. It must be exhausting," Kimmel replied and drank his wine.

"So, you host a television program, how fun," she responded. "You should enjoy it while it lasts."

"You know, you're so good on the show," Kimmel said. "Is it a challenge to play Cersei or [do] you just naturally suck the life out of every room you enter?"