mary kate olsen

For every Kylie Cosmetics, there's a Jessica Simpson Dessert that came before it...

Mary-Kate and Ashley Olsen have released a high-end, gender-neutral clothing line for kids.

From Ashton Kutcher to 'Avengers' star Scarlett Johansson, these are the celebrities you (probably) didn't know have a real-life twin.

It was reported that Mary-Kate Olsen was seen recently shopping for an engagement ring.

Let's take the Olsen Twins as an example of siblings who aren't alike.  Sure they both have had their fair share of rehab and problems but they still have different qualities and behaviors.