Maire O'Flynn and new husband Peter were celebrating their big day at Lough Eske Castle Hotel in County Donegal, Ireland when the actress and her husband Matthew Broderick arrived for dinner with friends at the venue's restaurant.
After her meal, Parker, who owns a holiday home in nearby Kilcar, joined the bride for pictures and showered her with compliments.
O'Flynn tells the Bbc, "She sent some of the staff to get me from the dance floor just as she was leaving, and I went out and got a lovely picture with her and she was very kind. She said that I looked beautiful and hoped that I was having a great day. She also mentioned that my bridesmaid looked fabulous, which was great... It was a nice addition to the day and added a bit of celebrity status to the occasion."