POWER OF ATTORNEY

       Know all by these presents, that the undersigned hereby constitutes and
appoints Matthew Lang, Charles Newton and Hector Casab of Lyell Immunopharma,
Inc. (the "Company"), and Anitha Anne and Allison Peth of Cooley LLP, or any of
them signing singly, with full power of substitution, the undersigneds true and
lawful attorney in fact to:
(1)		execute for and on behalf of the undersigned, in the undersigneds capacity
as an officer, director or beneficial owner of more than 10% of a registered
class of securities of the Company, Forms 3, 4 and 5 (including any amendments
thereto) in accordance with Section 16(a) of the Securities Exchange Act of
1934, as amended (the "Exchange Act") and the rules thereunder and a Form ID,
Uniform Application for Access Codes to File on EDGAR;
(2)	do and perform any and all acts for and on behalf of the undersigned that
may be necessary or desirable to execute such Forms 3, 4 or 5 or Form ID
(including any amendments thereto) and timely file such forms with the United
States Securities and Exchange Commission and any stock exchange or similar
authority; and
(3)	take any other action of any nature whatsoever in connection with the
foregoing which, in the opinion of such attorney-in-fact, may be of benefit, in
the best interest of, or legally required by, the undersigned, it being
understood that the documents executed by such attorney-in-fact on behalf of the
undersigned pursuant to this Power of Attorney shall be in such form and shall
contain such terms and conditions as such attorney-in-fact may approve in such
attorney-in-facts discretion.
       The undersigned hereby grants to each such attorney-in-fact full power
and authority to do and perform any and every act and thing whatsoever
requisite, necessary or proper to be done in the exercise of any of the rights
and powers herein granted, as fully to all intents and purposes as the
undersigned might or could do if personally present, with full power of
substitution or revocation, hereby ratifying and confirming all that such
attorney-in-fact, or such attorney-in-facts substitute or substitutes, shall
lawfully do or cause to be done by virtue of this power of attorney and the
rights and powers herein granted.  The undersigned acknowledges that the
foregoing attorneys-in-fact, in serving in such capacity at the request of the
undersigned, are not assuming, nor is the Company assuming, any of the
undersigneds responsibilities to comply with Section 16 of the Exchange Act.
       This Power of Attorney shall remain in full force and effect until the
earliest to occur of (a) the undersigned is no longer required to file Forms 3,
4 and 5 with respect to the undersigneds holdings of and transactions in
securities issued by the Company, (b) revocation by the undersigned in a signed
writing delivered to the foregoing attorneys-in-fact or (c) as to any
attorney-in-fact individually, until such attorney-in-fact is no longer employed
by the Company or Cooley LLP.
       IN WITNESS WHEREOF, the undersigned has caused this Power of Attorney to
be executed as of this 13th day of February, 2024.

						/s/ Stephen Hill
						Stephen Hill


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