Isla Lang Fisher (born 3 February 1976) is an Australian actress and author. She began acting on Australian Television, and is best known for her role of Shannon Reed on the Australian soap opera Home and Away and for her role in the 2005 comedy Wedding Crashers opposite Vince Vaughn and Owen Wilson.

At the age of eighteen, with the help of her mother, she wrote two teen novels, Bewitched and Seduced by Fame, that became bestsellers. From 1994 to 1997 she played the role of Shannon Reed on the hit Australian soap opera Home and Away. After leaving the popular soap to pursue new challenges, Fisher enrolled at a prestigious theatre and arts training school in Paris, and went on to appear in Pantomime in the United Kingdom. She also toured with Darren Day in the Summer Holiday musical, and appeared in a London theatre production called Così. Fisher's ambition was always to progress onto the big screen however, and in 2002 she had a part in the film version of Scooby-Doo as Mary-Jane, Shaggy Rogers's love interest, and subsequently was taken on by an American agent. A larger role in Wedding Crashers, alongside Vince Vaughn and Owen Wilson, in 2005 won her the Breakthrough Performance Award at the MTV Movie Awards. While promoting Wedding Crashers, she was officially crowned the 1000th guest on Australian talk show Rove on 2 August 2005. She entered the set ahead of Owen Wilson, winning the title by two meters.

In 2006, Fisher starred as Becca, a Manhattan party host in the offbeat relationship drama London co-starring Jessica Biel, Chris Evans and Jason Statham. In 2007, she appeared in The Lookout, a thriller co-starring Joseph Gordon-Levitt and Matthew Goode, and Hot Rod, opposite Andy Samberg. She was scheduled to appear in The Simpsons Movie, although her appearance was cut from the final version. In 2008, she starred in Wedding Daze with Jason Biggs, Definitely, Maybe, with Ryan Reynolds, Elizabeth Banks, and Abigail Breslin, and had a voice role in Horton Hears a Who! Fisher has also co-written a script entitled Groupies with Amy Poehler, as well as another project entitled The Cookie Queen. She will star in the movie adaption of the book Confessions of a Shopaholic, filming of which started in January 2008 for a February 13, 2009 release date.

Fisher has spoken out against the lack of opportunities for comediennes in Hollywood. (via Wikipedia)