Exhibit 23.1

CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM

We hereby consent to the incorporation by reference in the Registration Statements on Form S-8 (Nos. 333-35621, 333-91783, 333-152032, and 333-158870) of GenCorp Inc. of our report dated May 26, 2009 relating to the financial statements of the GenCorp Retirement Savings Plan, which appears in this Form 11-K.

/s/ PricewaterhouseCoopers LLP
Sacramento, California
May 26, 2009

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