YOUNG Advertising has signed an affiliation agreement with Leo Burnett Worldwide, the largest agency brand organisation in the United States, the Irish firm said last night.

Young, which is a subsidiary of Lopex, is one of Ireland's leading agencies, counting among its clients Showerings, First National Building Society, Erin Foods and Delta Air Lines.

Leo Burnett Worldwide's portfolios include Kellog's, McDonald's, Nestle and Philip Morris.