Star Magazine reports:

Talk about sibling rivalry! Twins Mary-Kate and Ashley Olsen are both in love and want to get married — sparking a race to the altar.

“Mary-Kate and Ashley are trying to one-up each other with their weddings,” a friend tells Star. “Neither of them wants to be second, because whoever gets married first will steal all the attention from the other!”

Will Ashley make it down the aisle first? Insiders close to her and actor-beau of a year, Justin Bartha, reveal the couple has been talking marriage and have already narrowed down the location to either Justin’s hometown of West Bloomfield, Mich., or New York City’s Plaza Hotel. Says one insider, “They are so ready!”

But so is Mary-Kate! The former wild child has settled down since she began dating artist Nate Lowman two years ago — and her ring finger is getting itchy. They might marry in NYC too. According to a friend, “She would love nothing more than to have people talk about her wedding for years to come — and forget all about Ashley’s!”