Exhibit 23.6

CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM

We hereby consent to the incorporation by reference in the Registration Statement on Form S-3 of Ameren Illinois Company of our report dated February 28, 2020 relating to the financial statements and financial statement schedule, which appears in Ameren Illinois Company’s Annual Report on Form 10-K for the year ended December 31, 2019. We also consent to the reference to us under the heading “Experts” in such Registration Statement.

/s/ PricewaterhouseCoopers LLP

St. Louis, Missouri

October 14, 2020