While a series regular on Mad Men, Moss made her Broadway debut in October 2008, playing the role of Karen in the 20th Anniversary revival of Speed-the-Plow by David Mamet.[17] She then appeared in the comedy film Did You Hear About the Morgans? (2009), playing Sarah Jessica Parker's assistant,[18] followed by a part in the comedy Get Him to the Greek (2010) opposite Jonah Hill.