Exhibit 32.1

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CERTIFICATIONS OF CHIEF EXECUTIVE OFFICER AND CHIEF FINANCIAL OFFICER PURSUANT TO 18 U.S.C.

SECTION 1350 AS ADOPTED PURSUANT TO SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002

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Pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, each of Frank J. Del Rio, the President and Chief Executive Officer, and Mark A. Kempa, the Executive Vice President and Chief Financial Officer of Norwegian Cruise Line Holdings Ltd. (the "Company"), does hereby certify, that, to such officer’s knowledge:

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The Quarterly Report on Form 10-Q of the Company, for the quarter ended June 30, 2021 (the “Form 10-Q”), fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934 and information contained in the Form 10-Q fairly presents, in all material respects, the financial condition and results of operations of the Company.

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Dated: August 9, 2021 |
| By: | /s/ Frank J. Del Rio
| Name: | Frank J. Del Rio
| Title: | President and Chief Executive Officer
| By: | /s/ Mark A. Kempa
| Name: | Mark A. Kempa
| Title: | Executive Vice President and Chief
​ | ​ | Financial Officer

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