EXHIBIT 23 CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM The Board of Directors and Stockholders Liberty Media Corporation: We consent to the incorporation by reference in the following registration statements of Liberty Media Corporation of our report dated March 14, 2005, except for Note 5 and Note 18, which are as of December 15, 2005, with respect to the consolidated balance sheets of Liberty Media Corporation as of December 31, 2004 and 2003, and the related consolidated statements of operations, comprehensive earnings (loss), stockholders' equity and cash flows for each of the years in the three-year period ended December 31, 2004, which report appears in the December 15, 2005 current report on Form 8-K of Liberty Media Corporation: FORM REGISTRATION STATEMENT NO. DESCRIPTION - ---- ------------------------- ----------- S-8 333-67276 Liberty Media Corporation 401(k) Savings Plan S-8 333-67296 Liberty Media Corporation Incentive Plan S-3 333-66034 (Post Effective Liberty Media Corporation $3.0 Billion, shares of Series A Amendment No. 1 to Form S-1) Common Stock, Debt Securities, or Warrants S-8 333-104154 Liberty Media Corporation 2002 Non-employee Director Incentive Plan KPMG LLP Denver, Colorado December 15, 2005