WhiteGrey has been left without a CEO as Miles Joyce leaves the business.
His exit comes only weeks after joint-CEO Paul Worboys resigned due to "family reasons".
John Steedman, WPP executive chairman of media investment and specialist businesses, will take on the role of acting CEO.
WPP has issued a statement confirming the move: "Following a discussion with Miles Joyce about the direction for WhiteGrey moving forward, we have agreed that a change of leadership is required and as such Miles has left the business.
"The search for a new CEO for the business is underway and an announcement about an appointment will be made in the coming weeks."
Worboys and Joyce
Joyce led The White Agency for a decade before becoming WhiteGrey joint-CEO last year when the agencies merged, a title he shared with Worboys.
He also founded NetX back in 1999, which was later acquired by Clemenger.
Steadman will work alongside Kate Walker, WPP group client director, to lead the business and its team throughout this transition period.
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