Richarlison, 20, joined from Fluminense in the summer, signing a five-year contract with the Premier League club.
The youngster has already scored one Premier League goal for his new team, and the former Brazil Under-20s international has said that he wants to "learn the song" that the Watford supporters have honoured him with this term.
"The fans here are wonderful. I want to learn the song to sing it along with them," Richarlison told Goal.com. "Their affection motivates me to play even better, run a bit further... I was very surprised by their reception, I don't have the words to describe what the fans have done for me."
Watford will return to Premier League action with a trip to Southampton next weekend.