Exhibit 5.1

601 Lexington Avenue

New York, NY 10022

United States

+1 212 446 4800

www.kirkland.com

March 31, 2020

Fox Corporation

1211 Avenue of the Americas

New York, New York, 10036

Re: Registration Statement on Form S-3

Ladies and Gentlemen:

We are issuing this opinion letter in our capacity as counsel for Fox Corporation, a Delaware corporation (the “Company”), in connection with the preparation and filing by the Company of a Registration Statement on Form S-3 (the “Registration Statement”) with the Securities and Exchange Commission (the “Commission”) under the Securities Act of 1933, as amended (the “Securities Act”), relating to the registration of an unspecified amount of the following Company securities: (a) shares of Class A common stock, par value $0.01 per share (the “Class A Common Stock”); (b) shares of Class B common stock, par value $0.01 per share (“Class B Common Stock” and, together with the Class A Common Stock, the “Common Stock”); (c) shares of preferred stock, par value $0.01 per share (the “Preferred Stock”); and (d) debt securities, which may be senior or subordinated (the “Debt Securities” and, collectively with the Common Stock and the Preferred Stock, the “Securities”).

In connection with this opinion, we have examined originals, or copies certified or otherwise identified to our satisfaction, of such documents, corporate records and other instruments as we have deemed necessary for the purposes of this opinion, including: (i) the organizational documents of the Company, (ii) minutes and records of the corporate proceedings of the Company with respect to the registration of the Securities and (iii) the Registration Statement and the exhibits thereto. You have also advised us that the Debt Securities will be issued under that certain Indenture, dated January 25, 2019 (the “Indenture”), between the Company and The Bank of New York Mellon Trust Company, N.A., as trustee (“Trustee”).

For purposes of this opinion, we have assumed the authenticity of all documents submitted to us as originals, the conformity to the originals of all documents submitted to us as copies and the authenticity of the originals of all documents submitted to us as copies. We have also assumed the legal capacity of all natural persons, the genuineness of the signatures of persons signing all documents in connection with which this opinion is rendered, the authority of such persons signing on behalf of the parties thereto, other than the Company, and the due authorization, execution and delivery of all documents by the parties thereto, other than the Company. We have not independently established or verified any facts relevant to the opinions expressed herein, but have relied upon statements and representations of the officers and other representatives of the Company and others.

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Fox Corporation

March 31, 2020

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We have also assumed that:

(i) the Registration Statement and any amendments thereto (including post-effective amendments) will have become effective under the Securities Act and will comply with all applicable laws at the time the Securities are offered or issued as contemplated by the Registration Statement;

(ii) a prospectus supplement (the “Prospectus Supplement”) will have been prepared and filed with the Commission describing the Securities offered thereby and will comply with all applicable laws;

(iii) the Securities will be issued and sold in compliance with applicable federal and state securities laws and in the manner stated in the Registration Statement and the appropriate Prospectus Supplement;

(iv) the Securities will be issued and sold in the form and containing the terms set forth in the Registration Statement, the applicable Prospectus Supplement and the Indenture, as applicable;

(v) the Securities offered, as well as the terms of the Indenture, do not violate any law applicable to the Company or result in default under, or breach of any, agreement or instrument binding upon the Company;

(vi) the Company will have obtained any legally required consents, approvals, authorization and other orders of the Commission and any other regulatory authorities necessary to issue and sell the Securities being offered;

(vii) the Securities offered, as well as the terms of the Indenture, comply with all requirements and restrictions, if any, applicable to the Company, whether imposed by any court or governmental or regulatory body having jurisdiction over the Company;

Fox Corporation

March 31, 2020

Page 3

(viii) a definitive purchase, underwriting, sales agency or similar agreement (each, a “Purchase Agreement”) with respect to any Securities offered or issued will have been duly authorized and validly executed and delivered by the Company and the other parties thereto;

(ix) any Security issuable upon conversion or exchange of the Securities, as applicable, will be duly authorized for issuance upon such conversion or exchange; and

(x) the Company will receive at least par value for the Securities issued, as applicable.

Based upon and subject to the foregoing qualifications, assumptions and limitations and the further limitations set forth below, and having regard for such legal considerations as we have deemed relevant, we advise you that:

1. When the shares of Common Stock to be offered and sold by the Company have been duly authorized by appropriate corporate action of the Company and issued, sold and delivered against payment therefor in accordance with such authorization, the applicable Purchase Agreement and applicable law and in the manner and for the consideration stated in the Registration Statement and in the applicable Prospectus Supplement, such shares of Common Stock will be validly issued, fully paid and non-assessable.

2. When, as and if (a) any particular series of Preferred Stock has been authorized and duly established in accordance with applicable law, (b) the appropriate corporate action has been taken by the Company to authorize the form, terms, issuance and delivery of shares of such Preferred Stock (and the filing of any required certificate of designation, amendment or supplement to the organizational documents of the Company), and (c) the shares of such Preferred Stock have been issued, sold and delivered against payment therefor in accordance with such authorization, the applicable Purchase Agreement and applicable law and in the manner and for the consideration stated in the Registration Statement and the applicable Prospectus Supplement, such shares of Preferred Stock will be validly issued, fully paid and non-assessable.

3. When, as and if (a) any Debt Securities have been duly authorized and duly established in accordance with the Indenture and applicable law, (b) the appropriate corporate or organizational action has been taken by the Company to authorize the form, terms, execution and delivery of such Debt Securities (and any required amendment or supplement to the Indenture), (c) the applicable Indenture has been duly executed and delivered by duly authorized officers, and (d) such Debt Securities have been duly executed, authenticated, issued and delivered, such Debt Securities will constitute valid and binding obligations of the Company enforceable against the Company in accordance with their terms.

Fox Corporation

March 31, 2020

Page 4

Our opinions expressed above are subject to the qualifications that we express no opinion as to the applicability of, compliance with, or effect of (i) any bankruptcy, insolvency, reorganization, fraudulent transfer, fraudulent conveyance, moratorium or other similar law affecting the enforcement of creditors’ rights generally, (ii) general principles of equity (regardless of whether enforcement is considered in a proceeding in equity or at law), (iii) public policy considerations which may limit the rights of parties to obtain certain remedies, and (iv) any laws except the laws of the State of New York and the General Corporation Law of the State of Delaware. In addition, we do not express any opinion as to the enforceability of any rights to contribution or indemnification which may be violative of public policy underlying any law, rule or regulation (including federal or state securities law, rule or regulation) or the enforceability of any so-called fraudulent conveyance or fraudulent transfer “savings clause” (and any similar provision in any other document or agreement) to the extent such provisions purport to limit the amount of the obligations of any party or the right to contribution of any other party with respect to such obligations.

To the extent that the obligations of the Company under the Indenture may be dependent on such matters, we assume for purposes of this opinion that the Trustee is duly organized, validly existing and in good standing under the laws of its jurisdiction of organization; that the Trustee is duly qualified to engage in the activities contemplated by the Indenture; that the Indenture has been duly authorized, executed and delivered by the Trustee and constitutes the legally valid and binding obligations of the Trustee, enforceable against the Trustee in accordance with its terms; that the Trustee is in compliance, generally and with respect to acting as trustee under the Indenture and with all applicable laws and regulations; and that the Trustee has the requisite organizational and legal power and authority to perform its obligations under the Indenture.

Our advice on every legal issue addressed in this opinion letter is based exclusively on the the internal law of the State of New York and the General Corporation Law of the State of Delaware, in each case as currently in effect, and represents our opinion as to how that issue would be resolved were it to be considered by the highest court in the jurisdiction which enacted such law. The manner in which any particular issue relating to the opinions would be treated in any actual court case would depend in part on facts and circumstances particular to the case and would also depend on how the court involved chose to exercise the wide discretionary authority generally available to it. This letter is not intended to guarantee the outcome of any legal dispute which may arise in the future.

We did not find it necessary for the purposes of this opinion, and accordingly we do not purport to cover herein, the application of the securities or “Blue Sky” laws of the various states.

Fox Corporation

March 31, 2020

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This opinion is limited to the specific issues addressed herein, and no opinion may be inferred or implied beyond that expressly stated herein. The Securities may be issued from time to time on a delayed or continuous basis, and this opinion is limited to the laws, including the rules and regulations, as in effect on the date hereof, which laws are subject to change with possible retroactive effect. This opinion speaks only as of the date hereof, and we assume no obligation to revise or supplement this opinion.

This opinion is furnished to you in connection with the filing of the Registration Statement and is not to be used, circulated, quoted or otherwise relied upon or otherwise referred to by any other person for any other purpose.

This opinion is being furnished in accordance with the requirements of Item 601 of Regulation S-K promulgated under the Securities Act, and no opinion is expressed herein as to any matter pertaining to the contents of the Registration Statement, other than as to the specific issues addressed herein, and no opinion may be inferred or implied beyond that expressly stated herein.

We hereby consent to the filing of this opinion with the Commission as Exhibit 5.1 to the Registration Statement. We also consent to the reference to our firm under the heading “Legal Matters” in the Registration Statement. In giving this consent, we do not thereby admit that we are in the category of persons whose consent is required under Section 7 of the Securities Act or the rules and regulations of the Commission.

Very truly yours,

/s/ Kirkland & Ellis LLP

KIRKLAND & ELLIS LLP