Danica McKellar

Danica Mae McKellar (born January 3, 1975) is an American actress, mathematics writer, and education advocate.

She is best known for playing Winnie Cooper in the television series The Wonder Years.

McKellar has appeared in various television films for the Hallmark Channel.

Her mother Mahaila McKellar (née Tello) was a homemaker; her father Christopher McKellar is a real estate developer; her younger sister Crystal (b. 1976) is a lawyer.

She is of paternal Scottish, French, German, Spanish, and Dutch descent and her mother is of Portuguese origin via the Azores and Madeira islands.

In her teens, she landed a prominent role in The Wonder Years, an American television comedy-drama that ran for six seasons on ABC, from 1988 to 1993.

She played Gwendolyn "Winnie" Cooper, the main love interest of Kevin Arnold (played by Fred Savage) on the show.

Her 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 has said that she found it "difficult" to move from being a child actress to an adult actress.

Since leaving The Wonder Years, McKellar has had several guest roles in television series (including one with former co-star Fred Savage on Working), and has written and directed two short films.

McKellar was featured in the video for Debbie Gibson's eighth single from the Electric Youth album, "No More Rhyme", which was released in 1989.

She plays the cello in the beginning of the video.

She appeared in two Lifetime films in the Moment of Truth series, playing Kristin Guthrie in 1994's Cradle of Conspiracy and Annie Mills Carman in 1996's Justice for Annie. She briefly returned to regular television with a recurring role in the 2002–03 season of The West Wing, portraying Elsie Snuffin, the half-sister and assistant of Deputy White House Communications Director Will Bailey.

McKellar studied at the University of California, Los Angeles where she was a member of the Alpha Delta Pi sorority and earned a Bachelor of Science degree summa cum laude in Mathematics in 1998.

As an undergraduate, she coauthored a scientific paper with Professor Lincoln Chayes and fellow student Brandy Winn titled "Percolation and Gibbs states multiplicity for ferromagnetic Ashkin–Teller models on ."

Their results are termed the "Chayes–McKellar–Winn theorem".

Later, when Chayes was asked to comment about the mathematical abilities of his student coauthors, he was quoted in The New York Times, "I thought that the two were really, really first-rate."

For her past collaborative work on research papers, McKellar is currently assigned the Erdős number four, and her Erdős–Bacon number is six.

At age seven, McKellar enrolled in weekend acting classes for children at the Lee Strasberg Institute in Los Angeles.

McKellar has also worked as a voice actress, having provided the voice of Jubilee in the video game X-Men Legends (2004), and Invisible Woman in Marvel: Ultimate Alliance (2006) and Marvel: Ultimate Alliance 2 (2009).

She provided the voice of Miss Martian in the TV series Young Justice.

McKellar appeared in lingerie in the July 2005 edition of Stuff magazine after readers voted her the 1990s star they would most like to see in lingerie.

McKellar explained that she agreed to the shoot in part to obtain "grittier roles".

In 2006, McKellar starred in a Lifetime film and web-based series titled Inspector Mom about a mother who solves mysteries.

On the August 1, 2007, edition of the Don and Mike Show, a WJFK-FM radio program out of Washington, D.C., McKellar announced that the producers of How I Met Your Mother were planning to bring her back for a recurring role (she guest-starred on the show in late 2005 in "The Pineapple Incident" and again in early 2007 in "Third Wheel").

She also made an appearance on the show The Big Bang Theory, in the episode "The Psychic Vortex".

In 2008, she starred in Heatstroke, a Sci-Fi Channel film about searching for alien life on Earth and in 2009 she was one of the stars commenting on the occurrences of the new millennium in VH1's I Love the New Millennium and was the math correspondent for Brink, a program by the Science Channel about technology.

In 2012, she starred in the Lifetime film Love at the Christmas Table with Dustin Milligan.

In 2013, she played Ellen Plainview in Lifetime's reimagining of the 1956 Alfred Hitchcock film The Wrong Man.

In January 2013, she starred in the Syfy film Tasmanian Devils with Apolo Ohno.

On August 20, 2013, Canadian singer Avril Lavigne released the music video for her single "Rock N Roll" from her self-titled fifth album, which features McKellar as "Winnie Cooper".

On March 4, 2014, she was announced to be competing on season 18 of Dancing with the Stars.

She paired with Valentin Chmerkovskiy.

McKellar and Chmerkovskiy were eliminated on Week 8, finishing in 6th place.

She had a guest appearance in the Impractical Jokers season four episode six titled "The Blunder Years".

She has also done voice acting, including Frieda Goren in Static Shock, Miss Martian in Young Justice, and Killer Frost in DC Super Hero Girls. In 2015, McKellar joined part of the main cast in the Netflix original series Project Mc2.

In addition to her acting work, McKellar later wrote seven non-fiction books, all dealing with mathematics: Math Doesn't Suck, Kiss My Math, Hot X: Algebra Exposed, Girls Get Curves: Geometry Takes Shape, which encourage middle-school and high-school girls to have confidence and succeed in mathematics, Goodnight, Numbers, and Do Not Open This Math Book.

McKellar was born in La Jolla, California.

She moved with her family to Los Angeles when she was eight.