Meet Mary-Kate and Ashley, the Tween queen Twins! Your new best friends have just arrived...

Ashley has a great idea! She's going to give a surprise party for her friend Jennifer. But Ashley gets a surprise, too -- when she finds out that Mary-Kate is giving another party for her best friend Amanda on the same night!

But the biggest shocker of all is the one Dad has for both of the girls -- one that's going to change their lives big-time!

Mary-Kate and Ashley Olsen have been huge international stars since the age of 9 months, when they shared the role of Michelle in the sit com FULL HOUSE. With videos, video games, CDs, dolls, books, a fashion line and a magazine already under their belts in the US, they are poised to take over the UK market in 2002.