American International Group Inc
The insurer said Miller, 64, is also chairman and chief executive officer of Marblegate Asset Management, a business affiliated with Miller Buckfire.
The U.S. government owns 79.9 percent of AIG, after committing more than $180 billion of taxpayer funds to the insurer. Last week, the U.S. Treasury named two former executives of E*Trade Financial and Electronic Data Systems to AIG's board.
Separately, earlier on Wednesday AIG said it will pay $9 million to settle an Ohio antitrust lawsuit accusing it of conspiring to fix commercial casualty insurance prices.
(Reporting by Elinor Comlay; Editing by Gary Hill)