Mary-Kate Olsen and her much older boyfriend, Olivier Sarkozy getting married?

To some Mary-Kate Olsen and her boyfriend are already one of the weirdest couples, but could this relationship become even weirder?

Rumor has it that Mary-Kate has been shopping around for an engagement ring. According to the Huffington Post, Mary-Kate Olsen has been spotted trying on engagement rings at the Neil Lane boutique in Los Angeles, and she seems serious about it.

Since going public with their relationship in May of 2012, Sarkozy, 44, and Olsen, 27 have seen plenty of media attention, I mean do you blame them.  Olsen is a successful fashion designer, and a source tells Page Six that "she really likes cushion-cut diamonds, and all of the rings she has looked at are over 5 carats." The source also said "I don't think price was an issue," noting that Olsen had set aside several rings with price tags of $100,000 or more, really that is a house!

Sarkozy was not present with Olsen at the shop, but this didn't stop Olsen from at least getting an idea for what she likes.

Huffington Post also says Sarkozy was previously married to Charlotte Bernard, who has called his present relationship with Olsen "grotesque" and "not right" due to their difference in age.

One thing is for sure, miss Full House is all grown up, and this would make a good new reality show. A Olsen Wedding, yeah that sounds good.