Exhibit 23.3
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June 28, 2006
Affiliated Managers Group, Inc.
AMG Capital Trust I
Ladies and Gentlemen:
We consent to the setting forth of our opinion and the reference to our name under the caption "Material United States Federal Income Tax Considerations" in the prospectus which forms a part of the registration statement on Form S-3.
In giving this consent we do not admit that we are within the category of persons whose consent is required under Section 7 of the Securities Act of 1933, as amended, or the general rules and regulations of the U.S. Securities and Exchange Commission promulgated thereunder.
Very truly yours,
/s/ Ropes & Gray
Ropes & Gray
