Meg Chambers Steedle stars in "Boardwalk Empire" on HBO as Billie Kent, Nucky's new mistress.Meg Chambers Steedle is a Hollywood newcomer who previously appeared in an episode of the ABC drama series "Body of Proof" and a couple of short films.On stage, she has been seen in "The Heir Apparent" with the Shakespeare Theatre Company at The Lansburgh Theatre in Washington, DC; "A Fox on the Fairway" at the Signature Theatre in Arlington, Virginia; "The Morning After / The Night Before" at The14th An