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-3 of our report dated February 23, 2017 relating to the financial statements, financial statement schedule and the effectiveness of internal control over financial reporting, which appears in Mattel, Inc.’s Annual Report on Form 10-K for the year ended December 31, 2016. We also consent to the reference to us under the heading “Experts” in such Registration Statement.

/S/ PRICEWATERHOUSE COOPERS LLP

Los Angeles, California

October 3, 2017