Twins share a special bond. Being born together and sharing the same milestones throughout life is not something that most of us singletons will ever truly relate to, but would love to be able to. Whether it’s Mary Kate and Ashley, Tia and Tamara, or those adorable kids down the block in their double stroller or matching outfits, twins turns head. While most of us are familiar with our favorite famous identical twin siblings, there are also a number of celebrities who have twins that we often don’t hear about. Some of these twins are also involved in the entertainment industry. Others are lesser-known and keep a relatively low profile despite their sibling’s success. Fraternal or identical, brother or sister – these celebrities have one thing in common: They all share a birthday with their best-friend sibling. Here are seven celebrities you didn’t know were twins.