UNITED STATES
SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549


FORM 8-K

CURRENT REPORT



Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934

Date of Report (Date of earliest event reported) December 14, 2005





First Midwest Bancorp, Inc.
(Exact name of registrant as specified in its charter)

Delaware
(State or other jurisdiction
of Incorporation)

0-10967
(Commission
File Number)

36-3161078
(IRS Employer
Identification No.)

One Pierce Place, Suite 1500, Itasca, Illinois
(Address of principal executive offices)

60143
(Zip Code)

(630) 875-7450
(Registrant's telephone number, including area code)


N/A
(Former name or former address, if changed since last report)

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions:

• Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425)
• Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12)
• Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b))
• Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))

FIRST MIDWEST BANCORP, INC.

FORM 8-K

December 14, 2005

On December 14, 2005, First Midwest Bancorp, Inc. announced that it had entered into an Agreement and Plan of Merger with Bank Calumet, Inc., pursuant to which Bank Calumet be merged with and into a subsidiary of First Midwest. A copy of the Agreement is attached as Exhibit 99 to this report.

Item 9.01 Financial Statements and Exhibits

(a) and (b) not applicable

(c) Exhibit Index:

99

Merger Agreement issued by First Midwest Bancorp, Inc. and Bank Calumet, Inc. dated December 12, 2005.

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the Registrant has duly caused

this report to be signed on its behalf by the undersigned thereunto duly authorized.

First Midwest Bancorp, Inc.

(Registrant)

Date: December 14, 2005

/s/ STEVEN H. SHAPIRO

Steven H. Shapiro
Executive Vice President