Well-received work on the cable miniseries "Band of Brothers" (2001) and "The Practice" subsequently led to Livingston's memorable turn on "Sex and the City" as Jack Berger, who infamously broke up with Sarah Jessica Parker's character on a Post-it note.
On the big screen, Livingston delivered impressive supporting performances in Adaptation (2002), The Cooler (2003), Little Black Book (2004), Winter Solstice (2005) and Pretty Persuasion (2005) before returning to television to star in the fast-paced drama "Standoff."