|The Big Bang Theory Staff|
|Birthday||January 3, 1975|
|First Episode||The Psychic Vortex|
|Role(s)||Actress, author, education advocate and director|
|All of the Big Bang Theory Staff|
Danica Mae McKellar (born January 3, 1975, ) is an , academic, and advocate. She is best known for her role as in the television show ', and later as author of the three ' bestsellers, Math Doesn't Suck, Kiss My Math, and Hot X: Algebra Exposed, which encourage girls to have confidence and succeed in mathematics. She played the role of Abby in The Big Bang Theory.
Born in La Jolla, California, McKellar moved with her family to when she was eight. Her mother Mahalia is a ; her father Christopher is a developer. Her family is "a big mix of ": Her mother's ancestry is (via the and ); her father's ancestry is , , , and . McKellar and her sister Crystal McKellar (who is loosely named after their dad) both maintained professional careers as children, but with a strong emphasis on as a priority. As a result, Crystal became a corporate (her family nicknamed her "Legally Blonde" because of her hair color), while Danica majored in . Danica and Crystal also have two half-brothers, Chris Junior and Connor McKellar.
The Wonder Years and early acting career
McKellar had a leading role in The Wonder Years, an American comedy-drama that ran for six seasons on the , from 1988 to 1993.
McKellar played Gwendolyn "Winnie" Cooper the main love interest of Kevin Arnold (played by ) on the show. In an episode entitled "The Accident" and in the final episode, it is stated that every important event in Kevin's life somehow involved Winnie. She lives on the same block as Kevin. Their first plays an important part of the pilot episode, as does her older brother's death while serving as a soldier in the . In one episode, her parents decide to get separated because of their grief over the death of their son. According to the in the final episode, Winnie studies in . Kevin and Winnie write one letter to each other every week for eight years until her return. Despite their life-long , they never marry. McKellar's first kiss was with Fred Savage in an episode of The Wonder Years. She later said, "My first kiss was a pretty nerve-wracking experience! But we never kissed off screen, and pretty quickly our feelings turned into brother/sister, and stayed that way." McKellar also had a role in the film , directed by Aaron Norris.
Adult roles McKellar has admitted the transition from "child actor to adult actor was a little bumpy." Since leaving The Wonder Years, McKellar has had several guest roles in series (including one with former co-star Fred Savage on Working), and has written and directed two short films. She played Kristin Guthrie in a 1994 TV movie, . In 1996, she played the character Annie Mills Carman in the Lifetime . She briefly returned to regular television with a recurring role in the 2002–03 season of , portraying Elsie Snuffin, the stepsister and assistant of Deputy Communications Director Will Bailey. McKellar appeared in lingerie in the July 2005 edition of after readers voted her the 90's star they would most like to see in lingerie. McKellar explained that she agreed to the shoot in part to obtain "grittier roles".
In June 2006, Lifetime Television announced that McKellar would star in a Lifetime movie and web-based series titled about a mother who solves .
In an interview in the November 17, 2006 issue of , McKellar said that two TV movies and ten webisodes of Inspector Mom were being produced. McKellar has provided the voices for two characters in three video games: Jubilee in (2004), and Invisible Woman in (2006) and (2009).
On the August 1, 2007, edition of the Don and Mike Show, a radio program out of , McKellar announced plans that the producers of were planning to bring her back for a recurring role (she guest-starred on the show in late 2005 in "The Pineapple Incident"). She appeared in the October 8, 2007, episode titled "Third Wheel", as well as an appearance on the show The Big Bang Theory.
In 2008, she starred in , a original movie about searching for on Earth.
McKellar, as of June 23, 2008, is one of the stars commenting on the occurrences of the new millennium in 's I Love the New Millennium, and as of 2009 is the math correspondent for , a program by the about upcoming .
In 2014, appearing on "Dancing with the Stars".
McKellar has also become a very experienced .
McKellar studied at , graduating with highest honors () in 1998. As an , she coauthored a scientific paper with Professor Lincoln Chayes and fellow student Brandy Winn. Their results are termed the 'Chayes–McKellar–Winn theorem'.