Most multinational firms today operate multilateral production networks. Most existing empirical analyses, however, have focused on firms' choice between producing at home and investing overseas. This paper uses detailed French multinational subsidiary data to examine the effect of existing production networks on multinationals' entry decisions. The paper finds strong horizontal and vertical interdependence across multinationals' foreign production locations, but little interdependence between home and foreign production when third-country effects are taken into account. This result constitutes a sharp contrast to the conventional emphasis, and highlights the importance of investigating foreign direct investment in the context of multinational production networks.