Today, Mary-Kate& Ashley turn 31 - here’s how our favorite twins celebrated their big day 10 years ago!

In 2007, the party girls kicked off festivities with a booze cruise alongside their closest pals:

While Mary-Kate danced on the deck, Ashley stayed holed up in the cabin, but the twins stepped out again nights later for a dinner at Hollywood’s Chateau Marmont:

Shortly after 11PM, two red velvet cakes were brought out, and a table of family and friends sang the girls ’Happy Birthday’ - but the fun didn’t end there.

As the duo promised on their website, they intended to make the most of their special day, and they did! Two nights later, more than 150 people crowed into the twins’ Beverly Hills mansion to cap off their birthweek.

The girls danced to a playlist of retro rock and confiscated cell phones at the door, preventing any illicit snaps from ruining their purported $300K asking price for a tabloid exclusive.

From friends to fellow celebrities, everyone from Joaquin Phoenix to Kirsten Dunst turned up to help the girls blow out their twenty-one candles.

The twins were also joined by little sister Lizzie:

Their father Dave:

Starving Nachos, fresh from visiting his ex-girlfriend in jail:

And Mary-Kate’s boyfriend Max Snow:

Let’s just say PDA wasn’t kept to a minimum…

At the end of the evening, the birthday duo addressed the crowd - and each other.

After blowing out their candles, Ashley told Mary-Kate: “No one could understand me the way you do. Nobody could relate to me the way you do. In fact, no one could tolerate me the way you do!” Aww.
Happy Birthday MK&A!
