This paper focuses on the impact of the fifth enlargement on the European Union Foreign Policy (EUFP). In the context of the U.S attack on Iraq in 2003 and the rhetorical image of the “old” and “new” Europe, a pervasive perception emerged that the voice of the EU would be weakened after May 2004. The EU-25 is now 11 months old and many questions are still up in the air. Will the new members act together as a block? Are the new members likely to become Trojan horses for the United States and thus prevent the development of a European security policy? The preliminary answer is that the EU has undergone a gradual process of adaptation, which was initiated prior to the formal enlargement and continues in the context of the participation of the new members in the EU foreign policy making. Rather than derailing the EUFP and despite the intrinsic differences among national foreign policies, it seems that new and old members negotiate on a daily basis to find consensus and implement the objectives of the EUFP.