Best known as The Waitress on It's Always Sunny in Philadelphia, actress Mary Elizabeth Ellis is returning for the final three Season 1 episodes of New Girl on Fox.

Mary Elizabeth Ellis is reprising her role as Caroline, Nick's (Jake M. Johnson) manipulative ex-girlfriend who was first seen in the Pilot, and then later returned for Episode 1.03: Wedding.

Mary Elizabeth Ellis's arch will coincide with Justin Long's earlier announced return in the penultimate Episode 1.23: Backslide, which finds Jess (Zooey Deschanel) and Nick (Jake M. Johnson) reuniting with their exes.

Mary Elizabeth Ellis is also set to guest star on Happy Endings March 28th with Episode 2.20: Big White Lies.