After videos of Knight singing I Have Nothing and I’m Every Woman, it’s the turn of fan-favourite I Will Always Love You.
The multi award-winning superstar joins the show’s cast in the role of Oscar-nominated superstar Rachel Marron from 9 September 2013.
Her arrival is set to keep audiences flocking to one of the West End’s hottest shows.
Ms Knight will be joined by former Casualty star Tristan Gemmill as Frank Farmer, the former Secret Service agent hired to protect Marron from an unknown stalker.
The pair take over from Heather Headley and Lloyd Owen.
The Bodyguard is playing at the Adelphi Theatre, for ticket and booking info visit thebodyguardmusical.com.