Who became the first Viceroy of India under the Act of 1858? What was Governor-General's new role as Viceroy under this Act?

Lord Canning became the first Viceroy of India under the Act of 1858.

The Governor-General's new role as Viceroy under this Act was that he ruled over the Provinces under the British rule and acted as 'Representative of the Crown' for the native princes and Nawabs.