This quote is attributed to Oscar Wilde, but it seems like he never said it. In fact, there is no direct source for this particular quote by anyone. Even the shorter version "Imitation is the greatest form of lattery" is much older than Oscar Wilde. The full quote apparently did not appear on the internet before 2012.
https://shkspr.mobi/blog/2024/01/no-oscar-wilde-did-not-say-...