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 SSI Alternative Income Fund, American Beacon ARK Transformational Innovation Fund, American Beacon TwentyFour Strategic Income Fund, and American Beacon TwentyFour Short Term Bond Fund, of the Registrant does not differ from that contained in Post-Effective Amendment No. 448 (“Amendment No. 448”) to the Registrant’s Registration Statement, (b) that the form of Statement of Additional Information used with respect to the American Beacon SSI Alternative Income Fund, American Beacon ARK Transformational Innovation Fund, American Beacon TwentyFour Strategic Income Fund, and American Beacon TwentyFour Short Term Bond Fund, does not differ from that contained in Amendment No. 448 to the Registrant’s Registration Statement, and (c) that Amendment No. 448 was filed electronically.