The professional dancers opened Movie Week with a Bridgerton-style waltz while surrounded by their fellow pros.
The love story of the performance saw Johannes portray a young king with no one to dance with before Kai stepped in to waltz him around the dancefloor.
Moving: Strictly Come Dancing fans were left in tears over Johannes Radebe and Kai Widdrington's waltz on Saturday's episode
Johannes teared up after the performance, as did many viewers at home who took to social media to praise the routine.
One viewer wrote: 'What a meaningful and beautiful opening to tonight's #Strictly. This dance moves me to tears, was such an emotional watch..
'The routine meant so much to Johannes, it melted my heart. Kai was your perfect dance partner for this beautiful routine.'
Another said: 'This is so special. I cried buckets first seeing Johannes & Kai dancing together so naturally, beautifully, effortlessly, but then Strictly, you floored me - ALL the