In 2004 she starred in a short-lived Fox network television series "Cracking Up" with actor Jason Schwartzman created by Mike White. That same year, she guest starred in an episode of "Scrubs" and starred as Mrs. Baker in the film "Good Boy!". In 2006, Shannon was featured in the Sofia Coppola directed movie "Marie Antoinette" as Aunt Victoire. The next year, Shannon guest starred on ABC's "Pushing Daisies", and appeared in the film "Evan Almighty". Shannon also made a rare move to drama, appearing in Mike White's film "Year of the Dog" in 2007. In 2013, Shannon joined White again playing his love interest Eileen in the HBO show "Enlightened" for which she was nominated for an Emmy for outstanding guest actress.