His family consists of his mother Nancy, a personal artist manager, and her father Paul Heigl, an investor and business executive. He also has four older brothers: Meg, Jason Y Holt.
At first, the constant businesses of their parents made them have to establish themselves in different parts of the nation. Finally, they were able to be located in Connecticut, where Katherine He grew up on a huge Victorian farm.
One day when he was only nine years old, his grandmother from New York came to visit and took pictures of all the family members. Finally, when he left, he asked his parents for permission to send the shots he had taken of Katherine to various modeling companies.
Many companies wanted the young girl to be the main face of their brands, so she became a child model overnight. Later, she began posing for clothing catalogs such as Sears Y Lord & Taylor, for more than $ 75 an hour.
Soon the commercials for television came and thus the fame of the girl continued to grow along with her. His debut on the big screen occurred in 1992, when he had a minor role in the film of Juliette Lewis “That night” (That night).
Immediately afterwards, he continued working on other feature films, always in small roles until 1994 when he received a leading role alongside Gerard depardieu in “My father the hero”(My father, the hero).
This romantic comedy was followed by the action movie of Steven Seagal “Under siege 2”(Under Danger 2) in 1995. Later, he went on to act in low-budget productions, such as“Wish upon a star“(Make a wish on the shooting star) or”Prince valiant”(Prince Valiant).
By 1998, horror movie fans were able to see her on “Bride of chucky”, After which a great wealth of men’s magazines began calling her to take pictures of her.
Once again, she had become the figure of the moment, posing for big brands like El Secreto de Victoria or GAP, while posts like Vogue or Vanity fair they put it on its lid.
Later, he entered the world of television with the science fiction series “Roswell”, Remaining in the role of Isabel evans ramirez from October 1999 to May 2002.
2001 saw her return to the big screen as the sexy girl in the movie “Valentine”. It was one of the typical “slasher”, Where a murderer goes through a town cutting and going through various victims while chasing one in particular.
Without being pigeonholed in any stereotype, Katherine decided to take part in a period production called “Love Comes Softtly”(Love comes softly). It tells the story of a woman who must suffer the onslaught of life, after her husband dies in the west they have just moved to.
Once the filming of “Roswell“, He worked on a new version of the classic”Wuthering Heights”(Wuthering Heights), which was followed by the prequel to“Romy and Michele’s High School Reunion”(Romy and Michele’s High School Reunion), starring Look sorvino Y Lisa kudrow.
It was in 2005 that he gained worldwide recognition, by joining the official cast of the telenovela of the ABC “Grey’s Anatomy“, In which she played doctor Isobel Stevens, in charge of neo natal surgery, constantly involved with the character of Patrick Dempsey.
Based on this role, he was offered to work on the documentary about the pharmaceutical industry “Side Effects” (Side effects). Later, Johnny knoxville he chose her to accompany him in “The Ringer” (The corridor).
In 2006 she was one of the protagonists of the independent film “Zyzzyx Road”, Sharing the credits with the renowned actor Tom sizemore. Towards the end of that year, she was nominated for a Golden Globe for his performance in “Grey’s Anatomy”.
Also during this time, she got engaged to her boyfriend Josh kelley and shot the feature film “Knocked up”(Embarrassing mess). His companions in this case were Leslie mann, who played his sister, Paul rudd, her sister’s husband, and Seth rogen, who got her pregnant after a night of drinking.
In the film, other major stars also appeared such as Jessica Alba, Steve Carell, James franco Y Eva mendes, as part of the interviews that Alison (Katherine) had to perform.
Surprisingly, at a production cost of $ 30 million, the film was a resounding success, reaching more than $ 220 million in sales. Most critics agreed that it was an unusual and funny script, featuring plump, funny men as not-so-bad dad prospects.
On December 23, 2007 she married her fiancé and together they fled on a romantic honeymoon to a resort in Cabo San Lucas. Upon his return, he released the film “27 Dresses” (27 weddings).
This romantic comedy established her as one of the most desirable women in the world, according to many men’s magazines. In addition, there he shared the filming sets with Edward burns and the appeal James marsden.
Then she could be seen on the tapes “The crude reality“, Which she starred in with Gerard butler, “Stylish killers“, with Ashton Kutcher Y Tom selleck, “Under the same roof”, In which he shared a poster with Josh duhamel, and soon it will be possible to see it next to John leguizamo, Daniel Sunjata Y Jason O’Mara in “One for the Money”, Scheduled for release in 2011.