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): June 14, 2010

DIGITAL REALTY TRUST, INC.

(Exact name of registrant as specified in its charter)

(415) 738-6500

(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 June 14, 2010, we issued 1,160,950 restricted shares of our common stock, par value $0.01 per share, which we refer to as the Shares, and paid an incentive fee equal to $184,800 and accrued and unpaid interest equal to $503,965, in exchange for $36,960,000 in aggregate principal amount of our operating partnership’s 4.125% Exchangeable Senior Debentures due 2026 held by Hudson Bay Fund LP, a Delaware limited partnership, which we refer to as Hudson Bay, pursuant to an exchange agreement, dated June 14, 2010, by and among us, our operating partnership and Hudson Bay.

The Shares were issued in a transaction exempt from registration pursuant to Section 4(2) of the Securities Act of 1933, as amended, and Rule 506 of Regulation D promulgated thereunder. The sale of the Shares did not involve a public offering and was made without general solicitation or advertising. Hudson Bay represented that, among other things, it was knowledgeable and experienced in financial and business matters so as to be capable of evaluating the merits and risks of investment in the Shares, it was afforded full access to information regarding our business, including reports filed with the Securities and Exchange Commission, it was acquiring the Shares for its own account, it understood that the Shares are subject to restrictions on transfer and that it is a “qualified institutional buyer” within the meaning of Rule 144A under the Securities Act of 1933, as amended.

Pursuant to the exchange agreement, we have agreed to register the resale of the Shares by Hudson Bay. A copy of the exchange agreement is attached as Exhibit 4.1 to this Current Report on Form 8-K and is incorporated herein by reference.

On June 15, 2010, we filed a prospectus supplement and related prospectus with the Securities and Exchange Commission pursuant to our shelf registration statement on Form S-3 (File No. 333-158958) registering the resale of the Shares. In connection with the filing of the prospectus supplement, we are filing as Exhibit 5.1 to this Current Report on Form 8-K an opinion of Venable LLP, regarding the validity of the Shares.

(d) Exhibits.

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.

Date: June 15, 2010

EXHIBITS