American Beacon Advisors, Inc.

220 E. Las Colinas Blvd. Suite 1200

Irving, TX 75039

December 28, 2021

VIA EDGAR

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Securities and Exchange Commission

100 F Street, N.E.

Washington, DC 20549

Re:  American Beacon Funds

1933 Act File No. 033-11387

1940 Act File No. 811-04984

Dear Sir or Madam:

Pursuant to Rule 497(j) of the Securities Act of 1933, as amended, American Beacon Funds (the “Registrant”) hereby certifies (a) that the form of Prospectus used with respect to the American Beacon SiM High Yield Opportunities Fund, American Beacon The London Company Income Equity Fund, American Beacon Zebra Small Cap Equity Fund, and American Beacon Sound Point Floating Rate Income Fund of the Registrant does not differ from that contained in Post-Effective Amendment No. 392 (“Amendment No. 392”) to the Registrant’s Registration Statement, (b) that the form of Statement of Additional Information used with respect to the American Beacon SiM High Yield Opportunities Fund, American Beacon The London Company Income Equity Fund, American Beacon Zebra Small Cap Equity Fund, and American Beacon Sound Point Floating Rate Income Fund does not differ from that contained in Amendment No. 392 to the Registrant’s Registration Statement, and (c) that Amendment No. 392 was filed electronically.

If you have any questions concerning the foregoing, please do not hesitate to contact the undersigned at (817) 391-6170.

Sincerely,

/s/ Rosemary Behan

Rosemary Behan

Chief Legal Officer

cc:    Kathy Ingber, Esq.

K&L Gates LLP