Jennifer was born in 1963, in Boston. Her father was Paul, a plastics manufacturer, and she has a sister, Suzanne.
Jennifer got a BA in Theatre from Emerson College in 1985 before moving to New York City and joining the Gotham City Improv group. Next, she travelled to to Los Angeles and became a long-running member of the Groundlings, another improv group. Initially working in TV, Jennifer has reached a wider audience through Christopher Guest's films Best in Show and A Mighty Wind, as well as Legally Blonde, American Pie and Lemony Snickett's A Series of Unfortuante Events.
Previously connected with Chris Kattan in 2001, she is now linked with Banks McClinktock (2008), and lives in Los Angeles.