As filed with the Securities and Exchange Commission on August 9, 2011

File No. 333-18737

File No. 811-07989

SECURITIES AND EXCHANGE COMMISSION

WASHINGTON, D.C. 20549

FORM N-1A

REGISTRATION STATEMENT

UNDER

THE SECURITIES ACT OF 1933	x
Pre-Effective Amendment No.	¨
Post-Effective Amendment No. 38	x

REGISTRATION STATEMENT

UNDER

THE INVESTMENT COMPANY ACT OF 1940	x
Amendment No. 40	x

METROPOLITAN WEST FUNDS

(Exact Name of Registrant as Specified on Charter)

865 South Figueroa Street

Los Angeles, California 90017

(Address of Principal Executive Offices)

(213) 244-0000

(Registrant’s Telephone Number)

David B. Lippman

865 South Figueroa Street

Los Angeles, California 90017

(Name and Address of Agent for Service)

It is proposed that this filing will become effective (check appropriate box).

x immediately upon filing pursuant to paragraph (b) of Rule 485

¨ on                      pursuant to paragraph (b) of Rule 485

¨ 60 days after filing pursuant to paragraph (a)(1) of Rule 485

¨ on                      pursuant to paragraph (a)(1) of Rule 485

¨ 75 days after filing pursuant to paragraph (a)(2) of Rule 485

¨ on                      pursuant to paragraph (a)(2) of Rule 485

Please send Copy of Communications to:

DAVID A. HEARTH, ESQ.

Paul, Hastings, Janofsky & Walker LLP

55 Second Street, 24^th Floor

San Francisco, CA 94105-3441

SIGNATURES

Pursuant to the requirements of the Securities Act of 1933 and the Investment Company Act of 1940, as amended, the Registrant certifies that it meets all of the requirements for effectiveness of this registration statement under Rule 485(b) under the Securities Act and has duly caused this Post-Effective Amendment No. 38 to be signed on its behalf by the undersigned, thereto duly authorized, in the City of Los Angeles and State of California on the 9^th day of August, 2011.

	Metropolitan West Funds
By:
	/s/ David Lippman
	David B. Lippman
	President and Principal Executive Officer

Pursuant to the requirements of the Securities Act of 1933, this Post-Effective Amendment No. 38 to the Registration Statement of Metropolitan West Funds has been signed below by the following persons in the capacities indicated on the 9^th day of August, 2011.

Signature	Capacity	Date
/s/ David Lippman	President and Principal Executive Officer	August 9, 2011
David B. Lippman
Charles Baldiswieler	Trustee	August 9, 2011
Charles Baldiswieler
/s/ Laird Landmann*	Trustee	August 9, 2011
Laird Landmann
/s/ David DeVito	Chief Financial Officer	August 9, 2011
David DeVito
/s/ Martin Luther King III*	Trustee	August 9, 2011
Martin Luther King III
/s/ Daniel D. Villanueva*	Trustee	August 9, 2011
Daniel D. Villanueva
/s/ Andrew Tarica*	Trustee	August 9, 2011
Andrew Tarica
/s/ Ronald J. Consiglio*	Trustee	August 9, 2011
Ronald J. Consiglio
Peter McMillan	Trustee	August 9, 2011
Peter McMillan
Robert G. Rooney	Trustee	August 9, 2011
Robert G. Rooney
Patrick Haden	Trustee	August 9, 2011
Patrick Haden
*by /s/ David A. Hearth		August 9, 2011

David A. Hearth, Attorney-in-Fact

pursuant to Power of Attorney

SCHEDULE OF EXHIBITS TO FORM N-1A

Metropolitan West Funds

Exhibit Number	Exhibit
EX-101.INS	XBRL Instance Document
EX-101.SCH	XBRL Taxonomy Extension Schema Document
EX-101.CAL	XBRL Taxonomy Extension Calculation Linkbase
EX-101.DEF	XBRL Taxonomy Extension Definition Linkbase
EX-101.LAB	XBRL Taxonomy Extension Labels Linkbase
EX-101.PRE	XBRL Taxonomy Extension Presentation Linkbase