The Hunger Games actress will appear in an episode of the Tina Fey series airing during May sweeps, according to TV Line.
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© NBC Universal
Her character Avery Jessup, the wife of Jack Donaghy (Alec Baldwin), was detained in North Korea and forced to marry Kim Jong-un in 30 Rock's fifth season last year.
Banks has also alluded to her return on Twitter, telling a fan who asked if Avery would back: "Patience, my son. All in good time."
When Baldwin tweeted that it was a "VERY good question", the actress wrote: "*arched eyebrow* *slow wink*."
Banks recently said that she was "surprised" by the response she received from 30 Rock fans following the real-life death of Kim Jong-il in December.
Producer Robert Carlock confirmed that the show will address the dictator's passing in an upcoming episode.
30 Rock airs Thursdays at 8.30/7.30c on NBC.
