Amazing Grace

During the scene in which William Wilberforce (Ioan Gruffudd) sings "Amazing Grace" at the card house, the singing was performed live by Gruffudd. In the previous several takes, a playback had been used, but it is Gruffudd singing in the final film. Director Michael Apted had no idea whether or not Gruffudd could actually sing. Little did he know, Gruffudd is an accomplished soloist and choir singer. With a little practice, Gruffudd performed for the first time on-set while the cameras were rolling, all much to the surprise of the cast, crew, and director.

There were at least 3 grammar mistakes: several uses of "I" when "me" should have been used. Wilburforce also says "By who?" As a graduate of Cambridge, he would have said, "By whom?"