OMB APPROVAL
                                                      --------------------------
                                                      OMB Number:      3235-0059
                                                      Expires: January 31, 2008
                                                      Estimated average burden
                                                      hours per response......14

                                  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 ADVISER SERIES
                        File Nos. 333-33978 and 811-09885
--------------------------------------------------------------------------------
                (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)(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:

--------------------------------------------------------------------------------
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 (05-05)

(JANUS CAPITAL Group LOGO)

                                                   PLEASE TAKE A MOMENT AND CAST
                                                 YOUR VOTE BEFORE DECEMBER 29TH!

                              IMPORTANT NOTICE FOR
                         SHAREHOLDERS OF THE JANUS FUNDS

November 22, 2005

             THE SPECIAL MEETING OF SHAREHOLDERS HAS BEEN ADJOURNED
             TO THURSDAY, DECEMBER 29TH AT 10:00 A.M. MOUNTAIN TIME

Dear Shareholder:

We are writing to inform you that the Special Meeting of Shareholders scheduled
for November 22, 2005 has been adjourned to Thursday, December 29, 2005, in
order to give you additional time to vote your shares. Our records indicate that
we still have not yet received a vote from you. We urge you to act promptly in
order to allow us to obtain a sufficient number of votes and avoid the cost of
additional solicitation.

YOUR VOTE IS IMPORTANT NO MATTER HOW MANY SHARES YOU OWN. In order for your
shares to be represented, we must receive your voting instructions by 10:00 a.m.
MT on Thursday, December 29th. After careful review, your fund's Board has
approved the proposals detailed in the proxy statement and urges you to vote
"FOR" each proposal and "FOR" each nominee presented for election to the board
of trustees. We have retained a professional proxy solicitation firm,
Computershare, to assist you with the voting process. If you have questions
regarding the meeting or to vote your proxy over the phone, please call
Computershare toll-free at 1-866-340-4019.

For your convenience, please utilize one of the following methods below to
register your vote:

            BY TELEPHONE:
            Call Computershare toll-free at 1-866-340-4019. Representatives are
            available to take your vote Monday through Friday between the hours
            of 9 am and 11 pm and Saturday from Noon to 6 pm Eastern Time.

            BY TOUCH-TONE PHONE: (available 24 hours)
            Call the toll-free number found on your voting instruction card and
            follow the instructions

            BY INTERNET: (available 24 hours)
            Log on to https://proxyvote.com

            BY MAIL:
            You may vote your shares by signing and dating your voting
            instruction card(s) and mailing it promptly in the enclosed postage
            paid envelope.

As the date of the adjourned Meeting moves closer and we still have not received
your vote, you may receive a call from Computershare reminding you to exercise
your voting rights.

We appreciate your careful and prompt consideration of this matter.

(JANUS CAPITAL Group LOGO)

                                                   PLEASE TAKE A MOMENT AND CAST
                                                 YOUR VOTE BEFORE DECEMBER 29TH!

                              IMPORTANT NOTICE FOR
                         SHAREHOLDERS OF THE JANUS FUNDS

November 22, 2005

             THE SPECIAL MEETING OF SHAREHOLDERS HAS BEEN ADJOURNED
             TO THURSDAY, DECEMBER 29TH AT 10:00 A.M. MOUNTAIN TIME

Dear Shareholder:

We are writing to inform you that the Special Meeting of Shareholders scheduled
for November 22, 2005 has been adjourned to Thursday, December 29, 2005, in
order to give you additional time to vote your shares. Our records indicate that
we still have not yet received a vote from you. We urge you to act promptly in
order to allow us to obtain a sufficient number of votes and avoid the cost of
additional solicitation.

YOUR VOTE IS IMPORTANT NO MATTER HOW MANY SHARES YOU OWN. In order for your
shares to be represented, we must receive your voting instructions by 10:00 a.m.
MT on Thursday, December 29th. After careful review, your fund's Board has
approved the proposals detailed in the proxy statement and urges you to vote
"FOR" each proposal and "FOR" each nominee presented for election to the board
of trustees. We have retained a professional proxy solicitation firm,
Computershare, to assist you with the voting process. If you have questions
regarding the meeting or to vote your proxy over the phone, please call
Computershare toll-free at 1-866-340-4019.

For your convenience, please utilize one of the following methods below to
register your vote:

            BY TELEPHONE:
            Call Computershare toll-free at 1-866-340-4019. Representatives are
            available to take your vote Monday through Friday between the hours
            of 9 am and 11 pm and Saturday from Noon to 6 pm Eastern Time.

            BY TOUCH-TONE PHONE: (available 24 hours)
            Call 1-866-235-4258

            BY INTERNET: (available 24 hours)
            Log on to:  https://vote.proxy-direct.com

            BY MAIL:
            You may vote your shares by signing and dating your proxy card(s)
            and mailing it promptly in the enclosed postage paid envelope.

As the date of the adjourned Meeting moves closer and we still have not received
your vote, you may receive a call from Computershare reminding you to exercise
your voting rights.

We appreciate your careful and prompt consideration of this matter.