CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM

We hereby consent to the incorporation by reference in this Registration Statement on Form N-1A of our report dated February 18, 2010, relating to the financial statements and financial highlights which appear in the December 31, 2009 Annual Report to Shareholders of Columbia Acorn Fund, Columbia Acorn International, Columbia Acorn USA, Columbia Acorn Select and Columbia Acorn International Select, which is also incorporated by reference into the Registration Statement. We also consent to the reference to us under the heading “Independent Registered Public Accounting Firm” in such Registration Statement.

Chicago, Illinois

September 24, 2010