UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

WASHINGTON, D.C. 20549

FORM 8-K

CURRENT REPORT

Pursuant to Section 13 or 15(d) of the

Securities Exchange Act of 1934

Date of report (Date of earliest event reported): September 6, 2012

Enstar Group Limited

(Exact name of registrant as specified in its charter)

Registrant’s telephone number, including area code: (441) 292-3645

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions (see General Instruction A.2. below):

On September 6, 2012, Enstar Group Limited (“Enstar”) and Pavonia Holdings (US), Inc. (“Holdings”), an indirect, wholly-owned subsidiary of Enstar, entered into a definitive agreement for the purchase of all of the shares of Household Life Insurance Company of Delaware and HSBC Insurance Company of Delaware from Household Insurance Group Holding Company, an affiliate of HSBC Holdings plc. The companies to be acquired have written various U.S. and Canadian life insurance, including credit insurance, term life insurance, assumed reinsurance, corporate owned life insurance, and annuities.

The base purchase price of $181 million will be adjusted under the terms of the stock purchase agreement based upon changes to the capital and surplus of the acquired entities arising from the operation of the business prior to closing. Enstar expects to finance the purchase price through a combination of cash on hand and a drawing under its revolving credit facility. Enstar is a party to the acquisition agreement and has guaranteed the performance by Holdings of its obligations thereunder.

Completion of the transaction is conditioned on, among other things, governmental and regulatory approvals and satisfaction of various customary closing conditions. The transaction is expected to close by the end of the first quarter of 2013.

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This Current Report on Form 8-K contains certain forward-looking statements within the meaning of the Private Securities Litigation Reform Act of 1995. These statements include statements regarding the intent, belief or current expectations of Enstar and its management team. Prospective investors are cautioned that any such forward-looking statements are not guarantees of future performance and involve risks and uncertainties, and that actual results may differ materially from those projected in the forward-looking statements as a result of various factors. In particular, Enstar may not be able to complete the proposed transaction on the terms summarized above or other acceptable terms, or at all, due to a number of factors, including but not limited to failure to obtain governmental and regulatory approvals or to satisfy other closing conditions. The foregoing list of important factors is not exhaustive. Other important risk factors regarding Enstar may be found under the heading “Risk Factors” in Enstar’s Form 10-K for the year ended December 31, 2011, and are incorporated herein by reference. Furthermore, Enstar undertakes no obligation to update any written or oral forward-looking statements or publicly announce any updates or revisions to any of the forward-looking statements contained herein, to reflect any change in its expectations with regard thereto or any change in events, conditions, circumstances or assumptions underlying such statements, except as required by law.

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SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized.

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EXHIBIT INDEX

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