It is great to have a niece in your life. She makes your life more fun and wonderful. Her each birthdays must be a special day for you since you have been with her since her birth. And when it is her 18th birthday it marks a special day for her and for you. If you are away from her and unable to be with her on her special day then share the below happy 18th birthday niece images, greetings, messages and make your presence felt with her. It is also the responsibility of her aunt and uncle to make this day a special one so never miss a single opportunity to wish her a happy 18th birthday.