Helen Mirren providing inner voice on Glee

Britney Spears, Nene Leakes... Helen Mirren? Add the dame and Oscar winner to the list of Glee guest stars, as Fox confirms to TheWrap that she has recorded a guest voice performance for the series' January 17 episode.

The installment, titled Yes/No, will find Mirren providing the inner voice of a Glee character. Sue Sylvester? Brittany Pierce (or her cat, Lord Tubbington)? Or maybe swim team coach Roz Washington, as played by another guest star, Nene Leakes? Leakes is also confirmed for the episode.

Fox declined to offer additional details about who Mirren will voice.

TVLine.com first reported the news of The Queen star's Glee gig, which was arranged by Glee director -- and Mirren's The Passion of Ayn Rand co-star -- Eric Stoltz.