Exhibit 23.1

CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM

We hereby consent to the incorporation by reference in this Registration Statement on Form S-8 of ATP Oil & Gas Corporation of our report dated March 16, 2010 relating to the financial statements, financial statement schedule and the effectiveness of internal control over financial reporting, which appears in ATP Oil & Gas Corporation’s Annual Report on Form 10-K for the year ended December 31, 2009.

/s/ PricewaterhouseCoopers LLP

Houston, Texas

December 17, 2010