Who was the real pianist in Green Book?

Related questions

1. Why was the Green Book created?
2. In what year does the Green Book take place?
3. Did Bohemian Rhapsody win any Oscars?
4. Why is it called Green Book?
5. Did Green Book win any Academy Awards?
6. What was the purpose of the Green Book?
7. Why does Viggo Mortensen speak so many languages?
8. What was the Green Book in the 60s?
9. How old is Viggo LOTR?
10. Did Mahershala Ali play the piano in Green Book?

Tags

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9. #1960s
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11. #viggo
12. #green
13. #songsmith
14. #unlikely
15. #musician
16. #chauffeur
17. #playing
18. #composer
19. #plays
20. #chronicles
21. #which
22. #polished
23. #early
24. #south