Exhibit 32.1

CERTIFICATION

PURSUANT TO 18 U.S.C. SECTION 1350,

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

I, Virginia C. Drosos, as Chief Executive Officer of Signet Jewelers Limited (the “Company”), hereby certify, pursuant to 18 U.S.C. § 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, that to my knowledge:

(1) the accompanying Quarterly Report on Form 10-Q for the period ending August 4, 2018, as filed with the US Securities and Exchange Commission (the “Report”) fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934, as amended; and

(2) the information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Company.

Date: September 6, 2018

By:	/s/ Virginia C. Drosos
Name:	Virginia C. Drosos
Title:	Chief Executive Officer