Richard J. Coyle Partner Chapman and Cutler LLP 320 South Canal Street, 27th Floor Chicago, Illinois 60606   T 312.845.3724 rcoyle@chapman.com

February 28, 2024

U.S. Securities and Exchange Commission

Division of Investment Management

100 F Street, N.E.

Washington, D.C. 20549

Re: Roundhill ETF Trust

(Registration Nos. 333-273052; 811-23887)

Ladies and Gentlemen:

On behalf of Roundhill ETF Trust (the “Registrant”), in accordance with the provisions of Rule 497(j) of Regulation C under the Securities Act of 1933 (the “Securities Act”), this letter serves to certify that the most recent amendment to the Registration Statement on Form N-1A (the “Registration Statement”) of the Registrant for Roundhill Daily 2X Long Magnificent Seven ETF, a series of the Registrant, does not differ from that which would have been filed pursuant to Rule 497(c) of the Securities Act. Post-Effective Amendment No. 45 was filed electronically with the Securities and Exchange Commission on February 27, 2024.

If we may cooperate with you in any way in the processing of this registration statement, please telephone the undersigned at (312) 845-3724.

Very truly yours,
Chapman and Cutler llp
By:	/s/ Richard Coyle
	Richard Coyle

Enclosures