Arsenal owner Stan Kroenke and director Josh Kroenke have been appointed co-chairs in a boardroom restructure.
Tim Lewis also becomes executive vice-chair having been on the board as a non-executive director since 2020.
Stan Kroenke, 75, aquired a 9.9% stake in Arsenal in 2007, becoming majority shareholder in 2011 and assuming 100% ownership in 2018.
The American said the changes "further reaffirms our family's long-standing commitment to this great club".
In a statement he added: "Stability in football has never been more important as we move past the [Covid] pandemic, and we believe this is the perfect time to formalise these roles.