June 13, 1986 in Sherman Oaks, CA.
Mary-Kate is younger than her super skinny twin sister Ashley by just 2 minutes.
Mary-Kate and her twin sister Ashley began their acting careers in 1987 playing the shared role of the adorable Michelle Tanner on Full House.
Mary-Kate has finally gotten over Paris Hilton's scruffy ex Stavros Niarchos and was seen hooking up with the young and rich Max Snow. In November 2007, Mary-Kate cuddled up to Lance Armstrong in NYC.
Mary-Kate remained in close contact with John Stamos, who played Uncle Jesse with her and Ashley on Full House.
In November 2007, Mary-Kate was hospitalized for what her rep called a "kidney infection", but that may or may not have been true.
On June 13, 2003 (her 17th birthday), CNN announced that MK was worth $150 million. They also predicted that she would be a billionaire by the age of 21.
She and Ashley created the Dualstar production company with Robert Thorne. They later produced a video series titled "The Adventures of Mary-Kate and Ashley" where they both played detectives.
Personal Quotes From Mary-Kate :
"I like to go to parties where I know everyone. How are you going to have fun with people you don't know?"
"Ashley and I get along really well, but TV and film aren't reality. We're best friends, but we do have our fights!"
"I usually do get the tomboy parts in the movies, which is kind of like me, but not totally. I like to shop as much as Ashley, but she is a little more of a girlie-girl than me."