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                                  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 Section 240.14a-12


                              JANUS INVESTMENT FUND
                         File Nos. 2-34393 and 811-1879
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                (Name of Registrant as Specified In Its Charter)


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    (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)(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:

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     4) Date Filed:

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PERSONS WHO POTENTIALLY ARE TO RESPOND TO THE COLLECTION OF INFORMATION
CONTAINED IN THIS FORM ARE NOT REQUIRED TO RESPOND UNLESS THE FORM DISPLAYS A
CURRENTLY VALID OMB CONTROL NUMBER.

SEC 1913 (04-05)

                              D.F. KING & CO., INC.

                                TELEPHONE SCRIPT

                               JANUS OLYMPUS FUND


INTRODUCTION
- ------------


Hello, my name is ___________, calling from D.F. King & Co., Inc. on behalf of
JANUS OLYMPUS FUND, may I speak with Mr./Ms. __________.

(Once Shareholder is on the line)

Mr./Ms. Shareholder - D.F. King & Co., Inc. has been retained by Janus to help
solicit and record shareholder votes with regards to the special meeting of
shareholders of Janus Olympus Fund scheduled for October 2, 2006. BEFORE I ASK A
FEW QUESTIONS ABOUT THE PROXY MAILING YOU RECEIVED, I WANT TO LET YOU KNOW THAT
THIS CONVERSATION IS BEING RECORDED FOR ACCURACY.

Have you received the proxy statement regarding the meeting?

         IF NO -- Then help the shareholder obtain the material he/she requires.
         If a NOBO, give him/her the 800# and have them call back when they
         receive it. If registered, we will send the materials directly. In
         either case, make sure the address is correct, make any necessary
         corrections, and code the disposition as "14" or "15".

IF YES -- The Board of Trustees for Janus Olympus Fund recommends that you vote
in favor of the proposal outlined in the proxy statement. For your convenience
you can cast your vote by mail, internet, or touch--tone telephone if you have
your proxy card or I can record your vote over the telephone right now. Would
you like me to record your vote over the telephone?

IF YES - Do you have any questions before we proceed?

         If shareholder asks how to vote via the internet, the website is
         www.2votefundproxy.com (NOBO -- www.proxyvote.com) - he/she will need
         the control number from his/her proxy card.

         If shareholder asks how to vote via touchtone telephone, the telephone
         number is 1-800-992-2416 (NOBO -- 1-800-454-8683) - he/she will need
         the control number from his/her proxy card.



         Take time to answer all questions carefully. Do not give advice. Remind
         the shareholder that his/her Fund's Board of Trustees has recommended
         that he/she vote in favor of the proposal. Most questions can be
         addressed by referring to the proxy statement and reading the
         appropriate sections.

         Here is how we will record your vote. I will ask you for 3 pieces of
         information for verification: your name, your address and ONLY the last
         4 digits of your social security number (or Tax Identification Number
         if shares are registered to an entity). Finally, I will confirm that
         you have received the proxy materials and then take your vote. You will
         be mailed a letter confirming your vote, which will tell you how to
         make any changes, if you wish. Is this process acceptable to you?

IF NO -- Do you have any questions that I may answer about this proxy for you?

         Take time to answer all questions carefully. Do not give advice. Remind
         the shareholder that his/her Fund's Board of Trustees has recommended
         that he/she vote in favor of the proposal. Most questions can be
         addressed by referring to the proxy statement and reading the
         appropriate sections or by referring to the Q&A that accompanied the
         proxy statement.

         At your earliest convenience, please vote by signing and dating the
         proxy card you received, and returning it in the envelope provided. You
         can also submit your vote by going on--line to www.2votefundproxy.com
         (NOBO -- www.proxyvote.com) or by calling 1-800-992-2416 (NOBO --
         1-800-454-8683). No matter how many shares you own, your vote is
         extremely important. Are you sure that you do not want to take
         advantage of voting your shares right now over the telephone?

IF YES - Are you ready?


BEGIN THE VOTE
- --------------

First, I'll reintroduce myself. My name is __________, calling from D.F. King &
Co., Inc. on behalf of JANUS OLYMPUS FUND. Today's date is __________ and the
time is __________.

May I please have your full name? If shareholder is an entity, may I please have
your title? Can you confirm that you are authorized to direct the voting of
these JANUS OLYMPUS FUND shares?

May I please have your address?

May I have only the last 4 digits of your social security number? (If
shareholder is an entity, ask for Tax Identification Number)

Input the last 4 digits of the SSN. You may NOT proceed without this
information. If the shareholder refuses to give this information, explain that
it is for security purposes only, to assure that only the proper person can vote
his/her shares. However, if the shareholder continues to resist, you have no
choice but to politely end the call and remind him/her of the other methods
he/she can use to cast his/her vote.



Have you received the proxy materials?


ACTUAL VOTING
- -------------


The Board of Trustees of Janus Olympus Fund recommends that you vote in favor of
the proposal outlined in the proxy statement. Would you like to vote in favor of
the proposal as recommended by your Fund's Board?

         If you are required to read the proposal, end by saying, "YOUR FUND'S
         BOARD OF TRUSTEES RECOMMENDS THAT YOU VOTE IN FAVOR. HOW WOULD YOU LIKE
         TO VOTE?" For the proposal, the valid responses are

                  F = For proposal.

                  A = Against proposal.

                  B = Abstain.

CLOSING
- -------

I have recorded your vote. You have voted __________. Is that correct? As your
voting agent, I will execute a written proxy in accordance with your
instructions and forward it to Janus to be presented at the Special Meeting of
Shareholders. In the next 72 hours, we will mail you a letter by first class
mail confirming your vote. If you wish to change your vote for any reason,
please call us at the phone number listed in the letter. Thank you for your
time.




                               JANUS OLYMPUS FUND

                            ANSWERING MACHINE MESSAGE


Hello, this is [name] calling from D.F. King & Co., Inc. on behalf of JANUS
OLYMPUS FUND. You should have recently received proxy materials in the mail
concerning the SPECIAL MEETING OF SHAREHOLDERS OF JANUS OLYMPUS FUND to be held
on OCTOBER 2, 2006.

Your vote is extremely important, please sign, date and return the proxy card at
your earliest convenience in the postage paid envelope provided.

If you prefer, and have a valid SSN on file with Janus, you can also vote by
Internet or touch-tone telephone by following the instructions included in the
mailing information.

If you have any questions regarding the information that you are being asked to
consider or need new proxy materials, please feel free to call D.F. King & Co.,
Inc. at (800) 628-8528 between the hours of 8:00 a.m. and 10:00 p.m. Eastern
Time, Monday through Friday, or 11:00 a.m. to 6:00 p.m. Eastern Time on
Saturday.

Thank you for your consideration.