Renly is not the KING.
Game of Thrones Season 1, Episode 10
considering the KING in question
Game of Thrones Season 5, Episode 8
The King will be delighted
to enjoy the company of a warrior
Game of Thrones Season 4, Episode 1
It seems your brother,
the King,
Vikings Season 1, Episode 7
The King who executed your father,
Game of Thrones Season 4, Episode 3