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): September 4, 2008
FIRST FINANCIAL BANCORP.
(Exact name of registrant as specified in its charter)

Ohio (State or other jurisdiction of incorporation) | 0-12379 (Commission File Number) | 31-1042001 (IRS Employer Identification No.)
4000 Smith Road Cincinnati, Ohio (Address of principal executive offices) |  | 45209 (Zip Code)

Registrant’s telephone number, including area code: (513) 979-5782
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 (see General Instruction A.2. below):

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

Form 8-K | First Financial Bancorp.

Item 7.01 Regulation FD Disclosure.
The executive officers of First Financial Bancorp intend to use the materials filed herewith, in whole or in part, in one or more meetings with investors and analysts. A copy of the investor presentation is attached hereto as Exhibit 99.1.
First Financial Bancorp does not intend for this Item 7.01 or Exhibit 99.1 to be treated as “filed” for purposes of the Securities Exchange Act of 1934, as amended, or incorporated by reference into its filings under the Securities Act of 1933, as amended.
Item 9.01 Exhibits.
The following exhibit shall not be deemed to be “filed” for purposes of the Securities Exchange Act of 1934, as amended.

| (c) | Exhibit:

99.1 First Financial Bancorp. Investor Presentation.

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 hereunto duly authorized.

| FIRST FINANCIAL BANCORP.
| By: | /s/ J. Franklin Hall
|  | J. Franklin Hall
|  | Executive Vice President and
|  | Chief Financial Officer
Date: September 4, 2008 |  |

Form 8-K | First Financial Bancorp.

Exhibit Index

Exhibit No. | Description
99.1 | First Financial Bancorp. Investor Presentation.