behind-the-scenes russian

• закули́сный

  backstage, behind the scenes

• кулуа́р

  lobby, lounge, antechamber, corridor

  informal talks, backstage discussions, behind the scenes

• подковёрный

  under-the-table, behind-the-scenes, covert, secret

• за ка́дром

  behind the scenes, backstage

Examples

• Подро́бности э́того соглаше́ния бы́ли выработаны за кули́сами.The details of the agreement were worked out behind the scenes.