Elisabeth Singleton Moss (born July 24, 1982) is an American actor and producer. Moss began acting in the early 1990s and first gained recognition for playing Zoey Bartlet, the youngest daughter of President Josiah Bartlet, in the NBC political drama series The West Wing (1999–2006). Wider recognition came for playing Peggy Olson, a secretary-turned-copywriter, in the AMC period drama series Mad Men (2007–2015). She has also starred in three films by Alex Ross Perry, including Her Smell (2018). In theater, Moss had roles in the Broadway productions of David Mamet’s Speed the Plow and Wendy Wasserstein’s The Heidi Chronicles.