By Adam Markovitz
Updated February 05, 2009 at 12:00 PM EST

Cereal manufacturer Kellogg will allow its contract with Olympian Michael Phelps to expire at the end of the month, Advertising Age reports. The announcement comes just three days after the appearance of photos in which the swimmer is shown smoking marijuana. “Michael’s mostrecent behavior is not consistent with the image of Kellogg,” said a rep for the company in a statement.