- Current report filing (8-K)

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):  April 29, 2009



Cougar Biotechnology, Inc.
(Exact name of registrant as specified in its charter)

Delaware
(State or other jurisdiction of incorporation)

001-33871		20-2903204
(Commission File Number)		(IRS Employer Identification No.)

10990 Wilshire Blvd, Suite 1200 Los Angeles, CA 90024

(Address of principal executive offices) (Zip Code)

[phone]
(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))

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Item 8.01.     Other Events.

On April 29, 2009, Cougar Biotechnology, Inc. issued a press release announcing the initiation of a Phase III clinical trial of its lead drug candidate CB7630 (abiraterone acetate) in patients with chemotherapy-naïve castration-resistant prostate cancer.  A copy of the press release is attached hereto as Exhibit 99.1 and incorporated herein by reference.      

Item 9.01     Financial Statements and Exhibits.

(d) Exhibits.

Exhibit No.			Description
	99.1		Press release dated April 29, 2009

SIGNATURE

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.

		COUGAR BIOTECHNOLOGY, INC.
Date:	April 29, 2009	By:		/s/ Charles R. Eyler
				Charles R. Eyler
				Treasurer and Sr. Vice President, Finance

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INDEX TO EXHIBITS FILED WITH THIS REPORT

Exhibit No.			Description
	99.1		Press release dated April 29, 2009.

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