The man who's often been referred to as the most powerful non-elected politician in the country is quitting.
Wayne Eagleson has been Sir John Key and Bill English's chief of staff for 12 years, but says it's time to look at other options.
Mr Eagleson will stay around until the new Government is formed, which is expected to be around mid-October.
Eagleson formally told Bill English last week he planned to resign after the election but insiders say it has been known by the Ninth Floor for several months that he planned to go, no matter what the election result.
He will stay on for the next few week to assist with coalition talks planned between National and New Zealand First.