JOINT FILING AGREEMENT
EXHIBIT 23
In accordance with Rule 13d-1(k) under the Securities Exchange Act of 1934, as amended, the
persons named below agree to the joint filing on behalf of each of them of a statement on Schedule
13D and Schedule 13G (including amendments thereto) with respect to the Common Stock of General
Growth Properties, Inc. and further agree that this Joint Filing Agreement be included as an
Exhibit to such joint filings. In evidence thereof, the undersigned, being duly authorized, have
executed this Joint Filing Agreement this 21st day of August 2007.
| GENERAL TRUST COMPANY |
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| By: | /s/ E. Xxxxxxx Xxxxxxx | ||||
| Name: | E. Xxxxxxx Xxxxxxx | ||||
| Title: | Vice President | ||||
| M.B. CAPITAL PARTNERS III |
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| By: | General Trust Company, Trustee of MBA Trust, a Partner | ||||
| By: | /s/ E. Xxxxxxx Xxxxxxx | ||||
| Name: | E. Xxxxxxx Xxxxxxx | ||||
| Title: | Vice President | ||||
| M.B. CAPITAL UNITS LLC |
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| By: | M.B. Capital Partners III, | ||||
| its sole member | |||||
| By: | General Trust Company, Trustee of MBA Trust, a Partner | ||||
| By: | /s/ E. Xxxxxxx Xxxxxxx | ||||
| Name: | E. Xxxxxxx Xxxxxxx | ||||
| Title: | Vice President | ||||
