EXHIBIT 32.1

                   CERTIFICATION OF PERIODIC FINANCIAL REPORTS

I, Gregory H. Boyce, Chief Executive Officer of Peabody Energy Corporation,
certify, pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906
of the Sarbanes-Oxley Act of 2002, that:

(1)   the Quarterly Report on Form 10-Q for the quarter ended March 31, 2006
      (the "Periodic Report") which this statement accompanies fully complies
      with the requirements of Section 13(a) or 15(d) of the Securities Exchange
      Act of 1934; and

(2)   information contained in the Periodic Report fairly presents, in all
      material respects, the financial condition and results of operations of
      Peabody Energy Corporation.

Dated:  May 9, 2006

                                                /s/ Gregory H. Boyce
                                                --------------------------------
                                                Gregory H. Boyce
                                                Chief Executive Officer