Danica Mae McKellar (born January 3, 1975)[1] is an American actress, mathematics writer, and education advocate.

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.

[9] In 1998, McKellar earned a Bachelor of Science degree in mathematics (summa cum laude) from UCLA, where she was a member of the Alpha Delta Pi sorority.

[10][11] 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

[13][14] 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.

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

[20] 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.

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

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

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".

[29] McKellar has authored several mathematics-related books primarily targeting adolescent readers interested in succeeding at the study of mathematics: Her first book, Math Doesn't Suck: How to Survive Middle School Math without Losing Your Mind or Breaking a Nail, was a New York Times bestseller,[2] and was favorably reviewed by Tara C. Smith, the founder of Iowa Citizens for Science and a professor of epidemiology at the University of Iowa.

The news segment highlighted her book Math Doesn't Suck and her efforts to help girls develop an interest in mathematics, especially during the middle school years.

The citation credited her books, blog, and public appearances for encouraging "countless middle and high school students, especially girls, to be more interested in mathematics.

"[42] McKellar married composer Mike Verta on March 22, 2009, in La Jolla, California; the couple had dated since 2001.

[46] On July 16, 2014, she became engaged to her boyfriend Scott Sveslosky, a partner in the Los Angeles legal firm Sheppard, Mullin, Richter & Hampton.