Animaniacs (TV Series)
- O Silly Mio/Puttin' on the Blitz/The Great Wakkorotti: The Summer Concert (1993) ... Katrina (voice)
From 1992 until 1995, Moss appeared in seven episodes of the TV series Picket Fences, as Cynthia Parks. Moss provided the voice of Holly DeCarlo, a main character in the 1992 TV special Frosty Returns. In 1993, she provided the voice of Michelle in the animated film Once Upon a Forest. That year, she appeared in the television remake of Gypsy. In 1994, Moss played Harvey Keitel's younger daughter in the film Imaginary Crimes. The following year, she appeared in the remake of the Walt Disney Pictures film Escape to Witch Mountain, and as a young Ashley Judd in the TV-movie biopic Love Can Build A Bridge.
From 1999 to 2006, she played Zoey Bartlet in 25 episodes of the White House TV drama The West Wing. In 1999, she had a supporting role as a patient in a mental institution in Girl, Interrupted, opposite Winona Ryder and Angelina Jolie. That same year, she had a small role as Katie Brockett in the movie Mumford, playing the daughter of a woman with a shopping addiction. Moss went on to do Heart of America and three other films in 2004 before making the movie Virgin, for which she was nominated for a 2004 Independent Spirit Award. She also appeared in the film Day Zero.
Since July 2007, she has played secretary-turned-copywriter Peggy Olson on the AMC dramatic series Mad Men. In 2009, 2011 and 2013, Moss was nominated for an Emmy for Outstanding Lead Actress in a Drama Series, and in 2010, she was nominated for the Outstanding Supporting Actress Emmy.
Moss made her Broadway début in October 2008, playing the role of Karen in the 20th Anniversary revival of Speed-the-Plow by David Mamet. She also starred in the 2008 horror film The Attic, and appeared in Did You Hear About the Morgans?, playing Sarah Jessica Parker's assistant. Moss's West End début was as Martha Dobie in Lillian Hellman's play The Children's Hour, which opened at The Comedy Theatre, London on Saturday 22 Jan 2011.
Moss played detective Robin Griffin in the 2013 Sundance Channel miniseries Top of the Lake, a co-production by the Sundance Channel, the UK's BBC Two and Australia's UKTV. It was written and directed by Oscar-winner Jane Campion.