Affiliated Managers (MGR) 10-K2004 FY Annual report

Filed: 16 Mar 05, 12:00am

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Exhibit 23.1

CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM

We hereby consent to the incorporation by reference in the Registration Statements on Forms S-3 (File No. 333-105523, File No. 333-74558, and File No. 333-62180) and S-8 (File No. 333-72967, File No. 333-84485, and File No. 333-100628) of Affiliated Managers Group, Inc. of our reports dated March 15, 2005 relating to the financial statements, financial statement schedule, management's assessment of the effectiveness of internal control over financial reporting and the effectiveness of internal control over financial reporting, which appear in this Form 10-K.

/s/ PricewaterhouseCoopers LLP

Boston, Massachusetts
March 15, 2005

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Exhibit 23.1