EXHIBIT 24

FORM
OF
POWER OF ATTORNEY

KNOW ALL PERSONS BY THESE PRESENTS, that the undersigned
hereby constitutes and appoints Nicholas J. Chulos,
Executive Vice President, General Counsel and Corporate
Secretary, Steven C. Babinski, Senior Vice President and
Assistant General Counsel, Debi Rouse, Corporate Paralegal,
Michelle Kennedy, Corporate Counsel or Andrea L. Stangl,
Assistant Corporate Secretary of First Midwest Bancorp, Inc.
(the ?Company?), and each of them acting and signing alone
and each with the power to appoint his or her substitute,
the undersigned?s true and lawful attorney-in-fact to:

(1)	execute for and on behalf of the undersigned, in the
undersigned?s capacity as an officer and/or director of
the Company or First Midwest Bank, Forms 3, 4 and 5 in
accordance with Section 16(a) of the Securities Exchange
Act of 1934 and the rules and regulations thereunder and
Forms 144 in accordance with Rule 144 under the Securities
Act of 1933;
(2)	do and perform any and all acts for and on behalf of
the undersigned which may be necessary or desirable to
complete and execute any such Form 3, 4, 5 or 144,
complete and execute any amendment or amendments thereto,
and timely file such form or amendment with the United
States Securities and Exchange Commission and any stock
exchange or similar authority; and
(3)	take any other action of any type whatsoever in
connection with the foregoing which, in the opinion of such
attorney-in-fact, may be of benefit to, in the best interest
of, or legally required of the undersigned, it being
understood that the documents executed by such
attorney-in-fact on behalf of the undersigned pursuant to
this Power of Attorney shall be in such form and shall
contain such terms and conditions as shall be deemed
appropriate by such attorney-in-fact in such
attorney-in-fact?s discretion.

The undersigned hereby grants to each such attorney-in-fact
full power and authority to do and perform any and every act
and thing whatsoever necessary, appropriate or proper to be
done in the exercise of any of the rights and powers herein
granted, as fully and to all intents and purposes as the
undersigned might or could do if personally present, with
full power of substitution or revocation, hereby ratifying
and confirming all that such attorney-in-fact, or such
attorney-in-fact?s substitute or substitutes, shall lawfully
do or cause to be done by virtue of this power of attorney
and the rights and powers herein granted.  The undersigned
acknowledges that the foregoing attorneys-in-fact, in
serving in such capacity at the request of the undersigned,
are not assuming, nor is the Company assuming, any of the
undersigned?s responsibilities to comply with Section 16
of the Securities Exchange Act of 1934 and Rule 144 under
the Securities Act of 1933.

This Power of Attorney shall remain in full force and effect
until the earliest of the following has occurred: (1) the
undersigned is no longer required to file Forms 3, 4, 5 and
144 with respect to the undersigned?s holdings of and
transactions in securities issued by the Company, (2) this
Power of Attorney is revoked by the undersigned in a signed
writing delivered to the foregoing attorneys-in-fact, or (3)
as to any attorney-in-fact individually, such
attorney-in-fact is no longer employed by the Company.

IN WITNESS WHEREOF, the undersigned has caused this Power of
Attorney to be executed as of this 20th day of August, 2019.

Signature:	/s/ THOMAS LYNN BROWN
Print Name:	Thomas Lynn Brown