Swallow continues to act on stage whenever she can, starring in world premieres of Donald Margulies' play The Country House at Los Angeles' Geffen Playhouse, opposite Mark Rylance in Louis Jenkins' play Nice Fish at the Guthrie Theatre, and in John Patrick Shanley's musical Romantic Poetry at Manhattan Theater Club.
In 2012, Swallow and fellow singer/comedian Jac Huberman created a stage show called Jac N Swallow, which they perform in New York at the Laurie Beeckman Theater and Joe's Pub.