Mary-Kate has been delighting fans for years as one-half of the famous Olsen twins. After leaving acting she created a fashion line together with her sister. They enjoy showing off their fashion style at the yearly Met Gala event. At the recent Met Gala, Mary-Kate wore her usual all-black look, wearing a long, dark Stephen Russell dress that ties at the waist. But tongues were waging this year as Mary-Kate looked much older than usual. Many said that since Ashley is single, she isn’t aging and quickly as her sister appears to be. Of course, Mary-Kate is famously married to Olivier Sarkozy, the half-brother of former President of France Nicolas Sarkozy, who is 17 years her senior.