CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM

We hereby consent to the incorporation by reference in this Registration Statement on Form N-1A of Columbia Acorn Trust of our report dated February 21, 2019, relating to the financial statements and financial highlights, which appears in Columbia Acorn Fund, Columbia Acorn International, Columbia Acorn USA, Columbia Acorn International Select, Columbia Acorn Select, Columbia Thermostat Fund, Columbia Acorn Emerging Markets Fund and Columbia Acorn European Fund’s Annual Report on Form N-CSR for the year ended December 31, 2018. We also consent to the references to us under the headings “Independent Registered Public Accounting Firm” and “Financial Highlights” in such Registration Statement.

/s/ PricewaterhouseCoopers LLP

     PricewaterhouseCoopers LLP

Chicago, Illinois

April 29, 2019