UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

WASHINGTON, D.C. 20549

SCHEDULE 14A

PROXY STATEMENT PURSUANT TO SECTION 14(A) OF THE

SECURITIES EXCHANGE ACT OF 1934

(AMENDMENT NO.      )

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 sec. 240.14a-11(c) of sec. 240.14a-12

DWS BLUE CHIP FUND

(Names of Registrants as Specified in their Charters)

(Name of Person(s) Filing Proxy Statement, if other than the Registrants)

Payment of Filing Fee (Check the Appropriate Box):

x  No fee required

¨  Fee computed on table below per Exchange Act Rules 14a-6(i)(4) 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:

YOUR VOTE IS IMPORTANT.

The Special Meeting of Shareholders of the DWS Blue Chip Fund has been adjourned to Monday, September 15, 2008, at 3:00 p.m. (Eastern Time).

We have not yet received your vote relating to the proposal that will be addressed at this Special Meeting. Voting now will help ensure that we receive enough votes to hold the Special Meeting as scheduled, and help save your Fund the cost of additional mailings and calls to shareholders.

Choose one of the following methods:

• Log on to the website noted on your proxy card, enter your control number printed on the card, and vote by following the on-screen prompts.

• Call the phone number on the proxy card, enter the control number printed on the card and follow the touchtone prompts.

• Mail in your signed proxy card in the envelope provided.

If you have questions regarding the proposal or voting process, or need additional copies of the materials, call your Fund’s proxy solicitor, D.F. King & Co., Inc. toll-free at (800) 714-3305.

The solicitor may call you if we do not receive your vote.

Thank you for your participation in this important matter.