UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

~~Washington~~WASHINGTON, D.C. 20549

FORM 8-K

CURRENT REPORT

Pursuant to Section 13 or 15(d) ~~of the~~

of the Securities Exchange Act of 1934

Date of ~~report~~Report (Date of earliest event reported): ~~February~~November 2, 42021 (November 2, ~~2011~~2021)

~~BlackRock~~BLACKROCK ~~MuniVest~~MUNIVEST ~~Fund~~FUND, ~~Inc~~INC.

(Exact Name of Registrant as Specified in Charter)

MARYLAND

811-05611

22-2919170

(State or Other Jurisdiction

of Incorporation)

(Commission

File Number)

(IRS Employer

Identification No.)

55 East 52nd Street, New York, New York		10055
(Address of Principal Executive Offices)		(Zip Code)

55 East 52nd Street

~~Registrant's~~New ~~telephone number~~York, ~~including~~New ~~area~~York ~~code: (212)~~10055 ~~810-5300~~

(~~Former~~Address ~~Name~~of orprincipal ~~Former~~executive ~~Address~~offices, ifincluding ~~Changed~~zip ~~Since Last Report~~code)

~~Check~~(212) ~~the appropriate box below if the Form 8~~810-K5300 ~~filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions (see General Instruction A.2. below):~~

~~¨ Written communications pursuant to Rule 425 under the Securities Act~~ (17Registrant’s ~~CFR~~telephone ~~230.425)~~number, ¨including ~~Soliciting~~area ~~material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12~~code) ¨ 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))

~~Section~~N/A ~~7 - Regulation FD~~

~~Item~~(Former ~~7.01 Regulation~~name FDor former ~~Disclosure.~~address, if changed since last report)

OnCheck ~~February~~the 4,appropriate ~~2011,~~box ~~BlackRock~~below if ~~MuniVest Fund, Inc. (~~the ~~"Fund")~~Form ~~announced~~8-K ~~that~~filing ~~the~~is ~~2011~~intended ~~Annual~~to ~~Meeting~~simultaneously ofsatisfy ~~Shareholders (~~the ~~"Annual~~filing ~~Meeting")~~obligation ~~has~~of ~~been~~the ~~scheduled~~registrant ~~for~~under ~~July~~any ~~28, 2011. A copy~~ of the ~~Fund's~~following ~~press~~provisions: ~~release is attached hereto as Exhibit 99.1 and incorporated herein by reference.~~

In☐ ~~accordance~~Written ~~with~~communications Rule 14a-5(f) under the Securities Exchange Act of 1934, as amended (the "Exchange Act"), the Fund's Board of Directors has determined that proposals to be considered for inclusion in the Fund's proxy statement for the Annual Meeting pursuant to Rule ~~14a-8~~425 under the ~~Exchange~~Securities Act must be received by the Fund at its principal executive offices on or before February 28, 2011. In addition, in order for stockholder nominations of directors or stockholder proposals made outside of Rule 14a-8 under the Exchange Act to be considered "timely" within the meaning of Rule 14a-4(c)17 ofCFR ~~the Exchange Act, such nominations or proposals must be received by the Fund at its principal executive offices on or before February 14, 2011~~230. ~~Proposals should be directed to the attention of the Corporate Secretary, BlackRock MuniVest Fund, Inc., 55 East 52nd Street, New York, New York, 10055.~~425)

~~Section~~☐ 9Soliciting –material ~~Financial~~pursuant ~~Statements~~to ~~and~~Rule ~~Exhibits~~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))

Item 7.01.

Regulation FD Disclosure.

On November 2, 2021, the Board of Directors (the “Board”) of BlackRock MuniVest Fund, Inc., a Maryland corporation (the “Fund”), elected to classify the Board, effective November 18, 2021, pursuant to provisions of the Maryland General Corporation Law. Also on November 2, 2021, the Board approved amending and restating the bylaws of the Fund in their entirety (the “Amended and Restated Bylaws”) to classify the Board and amend Article I, Section 11 of the bylaws relating to the election of Directors. The Amended and Restated Bylaws are effective November 2, 2021. A copy of the Amended and Restated Bylaws is included as Exhibit 3.1 to this report and incorporated by reference herein. The initial classes of Directors of the Fund are set out in Exhibit 99.1 to this report.

Item 9.01.

Financial Statements and Exhibits.

(d) Exhibits.

Exhibit No.		Exhibit
ExhibitNumber		Description
99.1		BlackRock MuniVest Fund, Inc. press release, dated February 4, 2011.
3.1		Amended and Restated Bylaws of BlackRock MuniVest Fund, Inc., effective as of November 2, 2021
99.1		Initial Classes of Directors

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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.

~~Date:~~BLACKROCK ~~February~~MUNIVEST 4FUND, ~~2011~~INC. By: /S/ JANEY AHN Name: Janey Ahn Title: Secretary

~~BlackRock~~DATE: ~~MuniVest Fund~~November 2, ~~Inc.~~2021 ~~By: / s/ Janey Ahn Name: Janey Ahn Title: Assistant Secretary~~

~~Exhibit~~-3- ~~Index~~

Exhibit No.		Exhibit
99.1		BlackRock MuniVest Fund, Inc. press release, dated February 4, 2011.

EXHIBIT INDEX


Exhibit Number		Description

3.1		Amended and Restated Bylaws of BlackRock MuniVest Fund, Inc., effective as of November 2, 2021

99.1		Initial Classes of Directors

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