The scene where William Wilberforce sings "Amazing Grace" at the card house was actually directly sung from
Ioan Gruffudd at that moment. In the last several takes, a playback was used, but it is Ioan singing. Director
Michael Apted had no idea whether or not Gruffudd could actually sing. Little did he know, Ioan is an accomplished soloist and choir singer. With a little practice, Ioan performed for the first time on set while the cameras were rolling. All much to the surprise of the cast, crew and director.
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