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): May 31, 2012

BOSTON PROPERTIES LIMITED PARTNERSHIP

(Exact Name of Registrant As Specified in Charter)

800 Boylston Street, Suite 1900, Boston, Massachusetts 02199

(Address of Principal Executive Offices) (Zip Code)

(617) 236-3300

(Registrant’s telephone number, including area code)

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 May 31, 2012, Boston Properties, Inc.’s operating partnership, Boston Properties Limited Partnership (the “Company”), entered into an underwriting agreement (the “Underwriting Agreement”) with Citigroup Global Markets Inc., J.P. Morgan Securities LLC, Merrill Lynch, Pierce, Fenner & Smith Incorporated and Morgan Stanley & Co. LLC, as managers of the several underwriters named in Schedule II thereto (the “Underwriters”), whereby the Company has agreed to sell and the Underwriters have agreed to purchase from the Company, subject to and upon the terms and conditions set forth in the Underwriting Agreement, $1,000,000,000 aggregate principal amount of 3.85% Senior Notes due 2023 (the “Notes”) to be issued by the Company. The Company expects to complete the issuance and sale of the Notes on June 11, 2012.

The offer and sale of the Notes were registered with the Securities and Exchange Commission (the “Commission”) pursuant to a registration statement on Form S-3 (File No. 333-176157-01) under the Securities Act of 1933, as amended (the “Securities Act”). The material terms of the Notes are described in a prospectus supplement filed by the Company with the Commission on May 31, 2012 pursuant to Rule 424(b)(5) under the Securities Act.

A copy of the Underwriting Agreement is attached hereto as Exhibit 1.1 and is incorporated herein by reference. The foregoing summary does not purport to be complete and is qualified in its entirety by reference to the Underwriting Agreement.

Additionally, in connection with the filing of the Underwriting Agreement, the Company is filing the opinion and consent of its counsel, Goodwin Procter LLP, regarding the legality of the securities being registered as Exhibits 5.1 and 23.1 hereto, respectively, which are incorporated by reference into the Registration Statement on Form S-3 (File No. 333-176157-01).

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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.