UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

WASHINGTON, DC 20549

SCHEDULE 14A

(RULE 14a-101)

SCHEDULE 14A INFORMATION

Proxy Statement Pursuant to Section 14(a) of the

Securities Exchange Act of 1934

Filed by the Registrant  x

Filed by a Party other than the Registrant  ¨

Check the appropriate box:

¨ Preliminary Proxy Statement

¨ Confidential, for Use of the Commission Only (as permitted by Rule 14a-6(e)(2))

¨ Definitive Proxy Statement

x Definitive Additional Materials

¨ Soliciting Material Pursuant to § 240.14a-12

KBS STRATEGIC OPPORTUNITY REIT, INC.

(Name of Registrant as Specified in its Charter)

Payment of Filing Fee (Check the appropriate box):

x No fee required.

¨ Fee computed on table below per Exchange Act Rules 14a-6(i)(1) and 0-11.

(1) Title of each class of securities to which transaction applies:

(2) Aggregate number of securities to which transaction applies:

(3) Per unit price or other underlying value of transaction computed pursuant to Exchange Act Rule 0-11 (set forth the amount on which the filing fee is calculated and state how it was determined):

(4) Proposed maximum aggregate value of transaction:

(5) Total fee paid:

¨ Fee paid previously with preliminary materials.

¨ Check box if any part of the fee is offset as provided by Exchange Act Rule 0-11(a)(2) and identify

the filing for which the offsetting fee was paid previously. Identify the previous filing by registration

statement number, or the Form or Schedule and the date of its filing.

(1) Amount Previously Paid:

(2) Form, Schedule or Registration Statement No.:

(3) Filing Party:

(4) Date Filed:

May 25, 2011

Re: 2011 Annual Proxy Reminder

Dear KBS Strategic Opportunity REIT Stockholder:

You recently received the 2010 Annual Report for KBS Strategic Opportunity REIT as well as the Proxy Statement and the Proxy Card for the Annual Meeting of Stockholders being held on July 7, 2011.

According to our latest records, we have not received your proxy vote for this meeting. Your vote is important, no matter how many shares you own. The Annual Meeting of Stockholders cannot be held unless stockholders holding a majority of our shares either attend the meeting or vote by proxy. For your convenience we have included another proxy ballot with this letter. You may cast your vote by mail via the enclosed ballot, or via the Internet or telephone using the instructions on the enclosed ballot.

Your vote is very important! Your immediate response will help avoid potential delays and may save us significant additional expenses associated with soliciting stockholder votes.

Sincerely,

Peter McMillan III

Chairman