It's common knowledge.

"'Common knowledge' refers to information that the average educated reader would accept without needing a source citation to back it up."

It's common knowledge Mark Zuckerburg is the face of Facebook. In normal comversation there's no need to prove that.

For those who don't know it's common knowledge, it's easy to search who is behind Hollywood, social media, most television, even your email providers and ancestry testing companies. And everythibg else too lol