Has The Cast Of Marvel Studios' Fantastic Four Been Revealed?

This last weekend an alleged leak seemed to confirm the casting of Marvel's upcoming Fantastic Four movie. The cast, as alleged, is as follows:

• Adam Driver as Reed Richards/Mr. Fantastic
• Margot Robbie as Sue Storm/Invisible Woman
• Paul Mescal as Johnny Storm/Human Torch
• Daveed Diggs as Ben Grimm/The Thing

If accurate, this leak provides an interesting cast that could provide for an engaging movie. Of note, Margot Robbie crossing the street to work with Marvel would mark the first time an actor played such a massive role in both a movie for Marvel Studios and DC (Ben Affleck doesn't count because they were a decade apart).