The Devil Wears Prada 2 Filming Meryl Streep

I couldn't find any information about Meryl Streep being involved in the filming of 'The Devil Wears Prada 2'. It appears that Meryl Streep played the role of Miranda Priestly in the original 2006 film of 'The Devil Wears Prada', but I couldn't find any information about a sequel film being made, let alone Meryl Streep's involvement.