SCHEDULE 14A
                                 (RULE 14a-101)
                    INFORMATION REQUIRED IN PROXY STATEMENT
                            SCHEDULE 14a INFORMATION

          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:

<Table>
                                            
[ ]  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 Rule 14a-12
</Table>
                          THE PARK AVENUE PORTFOLIO
- --------------------------------------------------------------------------------
                (Name of Registrant as Specified In Its Charter)

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

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:

        ------------------------------------------------------------------------

                                [GUARDIAN LOGO]

TO:   OUR BROKER DEALER ASSOCIATES

FROM: SHARON CAMPBELL
      DIRECTOR, EQUITY INVESTOR COMMUNICATIONS

DATE: OCTOBER 24, 2005

SUBJECT: FOLLOW-UP SOLICITATIONS FOR THE PARK AVENUE PORTFOLIO PROXY

As previously announced, Guardian proxy materials have been mailed to Park
Avenue Portfolio shareholders who had investments in The Park Avenue Portfolio
family of mutual funds as of September 16, 2005 (the Record Date).

FOLLOW-UP PROXY SOLICITATIONS

BY PHONE:
In our efforts to increase voter participation before the November 15,
2005 special meeting, we have contracted a proxy voting solicitor, D.F. King &
Co., Inc. Please be advised that some of your clients who have not already voted
may receive phone calls. Our proxy voting solicitor has been trained to answer
specific questions regarding the proposals, and they will also offer to record
your clients' vote while they have the shareholder on the line. Calls will be
made Monday though Saturday up until 8 p.m. (local time).

BY MAIL:
A follow-up letter will be mailed to all Park Avenue Portfolio shareholders who
have not voted. Included in the letter we will remind your clients that they are
being asked to vote on important matters that affect their investments. Also, in
order to pass the resolutions to make changes to the Funds we need to receive a
certain percentage of approval from our shareholders; the Board of Trustees has
already approved the proposals and they recommend that your clients vote for
them as well. In addition to this letter, emails with similar information will
be sent to shareholders enrolled in our electronic delivery program.

WE ENCOURAGE YOU REMIND YOUR CLIENTS THAT THEIR VOTE IS SIGNIFICANT, NO MATTER
HOW MANY SHARES THEY OWN.

IF YOU HAVE ANY QUESTIONS ABOUT THE PROXY SOLICITATION FOR THE PARK AVENUE
PORTFOLIO, PLEASE CONTACT BILL FORD, VICE PRESIDENT AND NATIONAL ACCOUNTS
MANAGER, BY CALLING (800) 650-6505, EXTENSION 3960 OR E-MAIL HIM AT
BILL_FORD@GLIC.COM

        FOR BROKER/DEALER USE ONLY. NOT FOR DISSEMINATION TO THE PUBLIC.

VARIABLE PRODUCTS AND THEIR UNDERLYING INVESTMENT OPTIONS AND THE PARK AVENUE
PORTFOLIO FAMILY OF MUTUAL FUNDS ARE OFFERED BY PROSPECTUS ONLY. PROSPECTUSES
CONTAIN IMPORTANT INFORMATION INCLUDING OBJECTIVES, RISKS, FEES AND EXPENSES AND
SHOULD BE READ CAREFULLY BEFORE INVESTING OR SENDING MONEY. YOUR CLIENT SHOULD
CONSIDER THE OBJECTIVES, RISKS, FEES AND CHARGES OF EACH INVESTMENT PRODUCT
CAREFULLY BEFORE INVESTING. THE PROSPECTUS CONTAINS THIS AND OTHER IMPORTANT
INFORMATION. COPIES CAN BE OBTAINED BY CALLING 1.800.221.3253 (VARIABLE
ANNUITIES), 1-800-441-6455 (VARIABLE LIFE INSURANCE POLICIES), (800) 650-6505
(PARK AVENUE PORTFOLIO), AND (877) 500-2380 (GUARDIAN ADVANTAGE/401(k)
INVESTOR).

Variable Annuity and Variable Life Insurance policies are issued
by The Guardian Insurance & Annuity Company, Inc. (GIAC), a Delaware
corporation, and are distributed by Guardian Investor Services LLC (GIS). The
Park Avenue Portfolio is distributed by GIS. GIAC and GIS are located at 7
Hanover Square, New York, NY 10004 1-800-221-3253.

You must be a registered representative and a licensed life insurance agent to
solicit variable life insurance and variable annuity products.

GIAC and GIS are wholly owned subsidiaries of The Guardian Life Insurance
Company of America, New York, NY. GIS is a member NASD, SIPC.

                                [GUARDIAN LOGO]

                          YOUR VOTE IS VERY IMPORTANT!
Dear Shareholder:

As a shareholder of The Park Avenue Portfolio family of mutual funds, you
recently received proxy materials asking for your vote on important proposals
that affect your investment. We apologize for any inconvenience with respect to
this follow-up mailing, but to date we have not received your vote. The
proposals that you are asked to consider were approved by the Board of Trustees.
The joint special meeting of shareholders is scheduled for November 15, 2005.
YOUR VOTE IS EXTREMELY IMPORTANT, NO MATTER HOW LARGE OR SMALL YOUR FUND
HOLDINGS. THEREFORE, WE ASK THAT YOU REGISTER YOUR VOTE WITHOUT DELAY.

We encourage you to use one of the following easy options today for recording
your vote:

1. VOTE BY TELEPHONE. You may cast your vote by telephone by calling
1-800-690-6903 and by following the prerecorded information. Please have your
proxy information available.

2. VOTE THROUGH THE INTERNET. You may cast your vote using the Internet by
logging onto WWW.PROXYWEB.COM and following the instructions on the website.
Please have your proxy information available.

3. VOTE BY MAIL. You may cast your vote by mail by signing, dating and mailing
the enclosed voting instruction form or proxy card in the postage-prepaid return
envelope provided.

For the reasons set forth in the proxy materials previously delivered to you,
THE BOARD OF TRUSTEES RECOMMENDS THAT YOU VOTE IN FAVOR OF THE PROPOSALS AND
BELIEVES THE PROPOSALS ARE IN THE BEST INTEREST OF THE SHAREHOLDERS OF THE
FUNDS.

Taking the time to vote at your earliest convenience is beneficial to all
shareholders, because it reduces the potential of the Funds incurring any
expenses from follow-up solicitations. Please take a few minutes to cast your
vote.

If you have any questions regarding this letter or need assistance in voting
your shares, please call D.F. King & Co., Inc., the fund's proxy solicitor toll
free at 1-800-628-8510.

                   YOUR VOTE IS IMPORTANT. PLEASE VOTE TODAY.

Sincerely,

/s/ Thomas G. Sorell

Thomas G. Sorell, CFA
President, The Park Avenue Portfolio
Chief Investment Officer, Guardian Investor Services LLC

                  The Park Avenue Portfolio is distributed by:
                      Guardian Investor Services LLC (GIS)
   GIS is an indirect wholly owned subsidiary of The Guardian Life Insurance
                        Company of America, New York, NY
                         GIS is a member of NASD, SIPC.

                                                                             PAP

             GUARDIAN INVESTOR SERVICES LLC (GIS) 7 Hanover Square,
                         New York, NY 10004 800.221.3253
            A broker/dealer offering securities products and services