She and Mary-Kate both had to wear fake teeth during the later years of "Full House" (1987) because their teeth began to look different.
In real life she and Mary-Kate are very close to John Stamos, who played their uncle Jesse on "Full House" (1987).
When she was young, she and Mary-Kate used to call their "Full House" (1987) co-stars by their characters names so they wouldn't mess them up during taping.
In 1993 she and Mary-Kate 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.
In May 2000, she and her sister, Mary-Kate Olsen, dedicated the Holland-America Line cruise ship, the "MS Zaandam".
On their 17th birthday (June 13, 2003), the U.S.'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.
At 17, she and her twin sister Mary-Kate were rated 2003's 2nd hottest teen female stars.
In 2004, her wealth was estimated to be $137 million.
She will be appearing alone on the cover of the July (2005) issue of Harpers Bazaar
She and her sister Mary-Kate were both ranked#6 in E's 50 most cutest child stars all grown up.(2005)
14 February 2005 - she filed a $20M libel suit against the "National Inquirer" for alleging her involvement in a drug scandal.
Recently launched a clothing line called The Row along with Mary-Kate. 
Was ranked #5 on Forbes List of The 20 Top-Earning Young Superstars.(2007). with sister Mary Kate.
Ranked #37 on the Maxim magazine Hot 100 of 2007 list. (She was listed alone, her sister Mary-Kate did not appear anywhere on the list).
Was cast as "Christie" in The Informers (2008) but dropped out at the last minute for undisclosed reasons. She was replaced by Amber Heard.
Ranked #47 on the Maxim magazine Hot 100 of 2008 list. (Once again she was listed alone, her sister Mary-Kate was not on the list.).
Abandoning her acting career to pursue her dream of fashion designing full-time [May 13, 2009].
Was in a relationship with Justin Bartha [2009-2011].