1. Passport - if you do not have one it can take up to 6 weeks to get one, so please plan ahead. (Even children need a passport to get in and out of Ireland) 2. Plane tickets & boarding passes. 3. Credit Cards & Cash 4. Chargers 5. Cocktail attire for the Wedding. 6. Layers..It can still be cooler in Ireland in June. 7. Rain Coat, much like CNY the weather can be very unpredictable.