Let's make this birthday one to remember.

37 years old (Born on June 13, 1986)

Actress, fashion designer, author, producer, businesswoman; She is famous from Olsen Twin.

As of January 2007, Ashley, together with her sister, Mary-Kate, have released nine books:
- Mary-Kate & Ashley In Action!
- Graduation Summer
- So Little Time
- Starring In
- The New Adventures of Mary-Kate & Ashley
- Mary-Kate & Ashley: Sweet Sixteen
- Mary-Kate & Ashley: Our Story
- Two Of A Kind
- New York Minute [edit] (tv.com) Younger sister of Trent Olsen. Older sister of Elizabeth Olsen Enjoys yoga and horseback riding. Mary-Kate went to Utah for rehab for her dramatic weight loss. It was decided that she had anorexia (tv.com)

Has a cousin named Christine

For the movie, The Wackness, 21-year-old Mary-Kate was required to passionately kiss 63-year-old Sir Ben Kingsley. (tv.com)

Twin sister of Ashley Olsen.

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

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

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

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

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

Her favorite party song is Rock Your Body.

Mary-Kate's height is 5'1" (tv.com)

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

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.

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.

Favorite Holiday - Halloween.
Favorite Color - Red.
Favorite Accesory - Purse.
Favorite Band - Dave Matthews Band.
Favorite Theme Park - Disneyland (tv.com)

Her favorite subjects in school are English and creative writing

Her favorite band is Dave Matthews

Majors in Cuisine at New York University.

Mary-Kate is best friends with fellow actress Eliska Amor. The friends met in the corridors of the HBO building in 2004 when Mary-Kate was a guest on The Tonight Show with Jay Leno. Both girls are called 'fashion icons' for their trendsetting rock-and-roll chic meets runway style and share a common passion for classic rock music. (tv.com)

Has a stepsister, Taylor & a stepbrother, Jake

In August 2007 Mary-Kate stopped her studies at NYU after her classmates kept selling stories to the tabloids. Although she has stopped studying, she remains enrolled at the university and has only a year-and-a-half to finish her degree (tv.com)

Mary-Kate is two minutes younger than her fraternal twin, Ashley (tv.com)

Wears a size 6.5 shoe.

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

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.

She dyed her hair a darker color so that people could tell her and Ashley apart, although some people were still unsure who actually dyed their hair in the first place (tv.com)

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

Mary-Kate was hospitalized in New York for a kidney infection in November 2007 (tv.com)

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

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

She practices Tae Bo and Yoga (tv.com)

She smokes cocaine (buzzle.com)

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.

Mary-Kate attended her dad's wedding while Ashley did not (tv.com)

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

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.

Mary-Kate received a Daytime Emmy Nomination for her role as Riley Carlson in the TV series So Little Time. Ashley was not nominated (tv.com)

Her favorite movie from 1986 is Labyrinth (1986).

In 2005, Paris Hilton started dating Mary-Kate's then boyfriend Stavros Niarchos, resulting in young Hollywood starlets choosing sides. Those on MK's side included: Ashley, Lindsay Lohan, Nicole Richie, and Hilary Duff. (tv.com)

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

in March 2007, Ashley and Mary-Kate revealed they planned to get matching nose jobs. After Ashley revealed to Mary-Kate that she thought her nose was too big and she was going to have rhinoplasty, Mary-Kate jumped at the idea as well (tv.com)

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 a cousin named Chelsey.

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

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

Mary-Kate is obsessed with Starbucks and gets iced and hot non-fat soy vanilla lattes (tv.com)

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

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

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

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.

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

She is younger than Ashley by about 2 minutes

Parents are David & Jarnette (divorced)

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.

Mary-Kate has been taking singing lessons in preparation for a CD release. She wants her music to be 'edgy (tv.com)

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

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.

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

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

Is very close to her older cousin Christine.

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

actress Kirstie Alley, who played Mary-Kate's kind and loving social worker in the 1995 film It Takes Two, has said that she feels Hollywood-based pressure may have contributed to Mary-Kate's eating disorder in 2003. "They're in an adult world with adult jobs, and they're basically children," Alley has said of both Mary-Kate and Ashley (tv.com)

Born at 10:28 am PDT.