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 DoubleLine Floating Rate Fund (formerly known as the American Beacon DoubleLine Floating Rate Income Fund) and the American Beacon DoubleLine Select Income Fund, of the Registrant does not differ from that contained in Post-Effective Amendment No. 447 (“Amendment No. 447”) to the Registrant’s Registration Statement, (b) that the form of Statement of Additional Information used with respect to the American Beacon DoubleLine Floating Rate Fund and the American Beacon DoubleLine Select Income Fund, does not differ from that contained in Amendment No. 447 to the Registrant’s Registration Statement, and (c) that Amendment No. 447 was filed electronically.