IGI Western Asset Investment Grade Defined Opportunity Trust Inc

Western Asset Investment Grade Defined Opportunity Trust Inc., which is traded on the New York Stock Exchange under the symbol "IGI", announced today monthly distributions of $0.1045 per common share for June, July and August 2010.

The distribution schedule appears below:

Month   Ex-Date   Record Date   Payable Date   Amount   Type June 6/16/2010 6/18/2010 6/25/2010 $0.0227 Income June 6/16/2010 6/18/2010 6/25/2010 $0.0818 Short-Term Capital Gains July 7/21/2010 7/23/2010 7/30/2010 $0.1045 Income August 8/18/2010 8/20/2010 8/27/2010 $0.1045 Income

This press release is not for tax reporting purposes but is being provided to announce the amount of the Fund's distributions that have been declared by the Board of Directors. In early 2011, after definitive information is available, the Fund will send shareholders a Form 1099-DIV, if applicable, specifying how the distributions paid by the Fund during the respective prior calendar year should be characterized for purposes of reporting the distributions on a shareholder’s tax return (e.g., ordinary income, long-term capital gain or return of capital).

Western Asset Investment Grade Defined Opportunity Trust Inc., a non-diversified, closed-end management investment company, is managed by Legg Mason Partners Fund Advisor, LLC, a wholly-owned subsidiary of Legg Mason, Inc., and is sub-advised by Western Asset Management Company, an affiliate of the investment manager.

Contact the Fund at 1-888-777-0102 for additional information, or consult the Fund's web site at www.leggmason.com/cef.

Data and commentary provided in this press release are for informational purposes only. Legg Mason and its affiliates do not engage in selling shares of the Fund.