Her favorite movie from 1986 is Labyrinth (1986).

Her favorite party song is Rock Your Body.

She and Ashley both had to wear fake teeth during the later years of "Full House" (1987) because their teeth began to look different.

During the filming of "Full House" (1987), she acted out the comedic scenes while Ashley took on the more serious ones.

Was ranked #5 on Forbes List of The 20 Top-Earning Young Superstars.(2007). with sister Ashley.

When she was young, she and Ashley used to call their "Full House" (1987) co-stars by their characters' names so they wouldn't mess them up during taping.

Has a cousin named Chelsey.

She smokes cocaine

In 2004, her wealth was estimated at $137 million.

Was ranked #5 on Forbes List of The 20 Top-Earning Young Superstars.(2007). with sister Ashley

Hospitalized November 19, 2007 in New York for a kidney infection.

Is very close to her older cousin Christine.

Mentioned in the song High School Never Ends by Bowling for Soup.

She and her sister Ashley were both ranked #6 in E`s 50 cutest child stars all grown-up.(2005)

While making the film To Grandmother`s House We Go (1992) (TV) in Canada, she rode her first horse and becomes a devoted equestrian.

During the filming of "Full House" (1987), she acted out the comedic scenes while Ashley took on the more serious ones

Her film _New York Minute (2004/I)` earned only $5.96 million during its opening weekend. This was the lowest amount ever earned for any film opening in over 3,000 theaters.

Named #32 in FHM`s "100 Sexiest Women in the World 2005" special supplement. (2005)

Majors in Cuisine at New York University.

Likes small specialty shops in Soho, South Beach, and Los Angeles.

Has a stepsister, Taylor & a stepbrother, Jake

Ranked #3 in VH1`s list of the "100 Greatest Kid Stars" with sister Ashley

Parents are David & Jarnette (divorced)

Born at 10:28 am PDT.

She donated many signed head-shots to Rocky Stone to be auctioned off to raise money to buy more toys for less fortunate kids as part of the Toy Mountain Campaign 2004.

Younger sister of Trent Olsen.

She and Ashley both missed their high school prom to host "Saturday Night Live" (1975). The cast made it up to them by giving them a fake prom when they did their monologue.

At 17, she and her twin sister Ashley were rated 2003`s 2nd hottest teen female stars.

She has reportedly entered a program for treatment of an eating disorder. [June 22, 2004]

She is younger than Ashley by about 2 minutes

Wears a size 6.5 shoe.

Her favorite band is Dave Matthews

She and her sister became the youngest self-made millionaires in American history before they were 10 years old.

Has a cousin named Christine

Her favorite subjects in school are English and creative writing

Voted the 20th most wanted young star for the new year by Access Hollywood and The-N networks. Her sister Ashley wasn`t part of the honor.

During the earlier seasons of "Full House" (1987), the producers did not want it known that Michelle was played by twins, so Mary-Kate and Ashley were credited as Mary Kate Ashley Olsen.

Ranked #61 in FHM`s `100 Sexiest Women` poll of 2003

On their 17th birthday (June 13, 2003), the US`s Cable News Network (CNN) announced not only their birthday but the twins` total financial worth - $150,000,000 for each. The same news source predicted the twins may be billionaires by the time they`re 21.

In 1993 she and Ashley were supposed to play young Eves (Teena and Cindy) on "The X Files" (1993), but were eventually replaced by the Krievins twins (Erika Krievins and Sabrina Krievins) from the nearby of Vancouver. The reason were very strict child labor laws.

Enjoys yoga and horseback riding.

Has a line of clothing with sister Ashley that is sold at Wal-Mart

Has a bi-monthly magazine called Mary-Kate and Ashley Magazine

At age 6, she and Ashley became the youngest producers in history.

She and Ashley both had to wear fake teeth during the later years of "Full House" (1987) because their teeth began to look different

Has two horses, CD and Star, and has won several prizes with them.

Enjoys shopping, going to the movies, listening to rock music (ie., Counting Crows), cheerleading and Tae Bo with her sister.

In real life she and Ashley are very close to John Stamos, who played their uncle Jesse on "Full House" (1987).

Older sister of Elizabeth Olsen

Twin sister of Ashley Olsen.