The actress is joined by returning members such as Jake Johnson, Lamorne Morris, Max Greenfield and Hannah Simone, reported Ace Showbiz.
Fox joined the comedy series this season to fill in for the lead actress Zooey Deschanel who took maternity leave. The "Teenage Mutant Ninja Turtles: Out of the Shadows" actress herself is now expecting her third child.
"Every network comedy should aspire to what Liz Meriwether is achieving in New Girl, with its bravura dialogue, inventive and witty performances by the talented cast and emotionally engaging storytelling," FOX entertainment president David Madden said in a statement.