When it comes to sending wedding wishes for niece, you can use words like “only the best wedding wishes for my niece”, or “may your wedding be a happy wedding day, full of love and happiness”.
Remember this is a day filled with happiness and joy, so keep all your niece wedding wishes full of positive energy, so use wedding wishes like “I know you will have a happy married life niece”, or “Sending wedding congratulations to my favorite niece”, or “enjoy a happy wedding”.
Just make sure she has a special day that will stay with her forever.