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Watching a promising child star blossom into a young adult is a pretty amazing thing. I mean, as history has often shown, child stars don't often enter adulthood gracefully. So that means when one of them still has control over their life by the time they reach 18, you can't help but feel happy for them. Perhaps no child stars have been analyzed as much as Mary Kate and Ashley Olsen. From the time they were six months old, they've been living their lives on the big screen and growing into household names. But believe me when I tell you that you will not believe what they look like now. Can You Tell The Baby Olsen Twins Apart? Although they often looked identical as children and young teens due to the same hairstyle and hair color as well as matching outfits, Mary Kate and Ashley Olsen aren't identical twins. One easy way to spot the difference is that Mary Kate's eyes are rounder in shape. RELATED: Learn Why Mary-Kate And Ashley Olsen Won’t Appear On ‘Fuller House’ Two Girls, One Role To Play On 'Full House' Michelle Tanner / ABC The Olsen twins were a hit sharing the role of Michelle Tanner on the popular sitcom, Full House (1987-1995). Many viewers felt like they watched Michelle Tanner grow up on the show since her character appeared first as an infant then stayed on through the years from beginning to talk to being a toddler to going to school. Even As Pre-Teens No Longer In 'Full House,' The Olsen Twins Dressed Alike Even when their Full House years were long behind them, Ashley and Mary-Kate Olsen still dressed alike. They were adorable kids in any outfit they wore at any age! In Their 20s, The Olsen Twins Made Their Last Movie Together 'New York Minute' / Dualstar The film, New York Minute (2004), was the last movie the Olsen twins appeared in together. They still dressed quite similarly off-screen as well. The Olsen Twins Really Used Their Heads... As An Individual Style Statement Once down that road of having different hair, Mary-Kate and Ashley never seemed to look back. The color differences and textures only became more pronounced as they got older. They still would often wear a similar color of clothing, but each twin gave it her own style. Similar, But Not The Same Mary-Kate and Ashley / Wikimedia Commons Even when they're dressed similarly, it seems that the differences in how they look is getting more pronounced as they get older. They're sororal twins (the female version of fraternal), yet somehow always looked identical. It seems with age the differences between them are becoming more noticeable. Mary Kate's eyes being rounder in shape, it's now much easier to recognize than it was when they were toddlers. Even though their hair is similarly styled here, it's much easier to tell them apart. Will The Differences Only Increase Over Time? If you look at a picture of them now, it is almost impossible to believe that they were once mistaken for identical twins. Hair, clothing, and make-up went a long way in helping the two look alike, but it could just be that aging is emphasizing the features that make them look dissimilar. Time will tell. Different Looks For The Grown-Up Olsen Twins, Yet Equally Beautiful Mary-Kate and Ashley / Facebook Although they do, as 30-something grown women, look very different from one another, they both dress tastefully. That stands to reason as the Olsen twins work together in their fashion design business. It seems they like to express that although they are twins and business partners, they also have two separate minds. As adult professionals, they can think for themselves, even if they are always a team.