Full details of the LAC Transaction are included in the LAC Arrangement Agreement and will be included in a management information circular of Millennial that is expected to be mailed to Voting Securityholders in December 2021 (the "Circular"). The LAC Arrangement Agreement and Circular will be made available on SEDAR under the issuer profile of Millennial at www.sedar.com.

This press release does not constitute an offer to sell, or the solicitation of an offer to buy, any securities.

Advisors and Counsel

Greenhill & Co. Canada Ltd. is acting as financial advisor to Lithium Americas and Cassels Brock & Blackwell LLP is acting as Lithium Americas' legal advisor.

Credit Suisse Securities (Canada) Inc. is acting as financial advisor to Millennial and Dentons Canada LLP is acting as Millennial's legal advisor. Sprott is acting as financial advisor to the Special Committee.

About Lithium Americas

Lithium Americas is a development-stage company with projects in Jujuy, Argentina and Nevada, United States. Lithium Americas trades on both the Toronto Stock Exchange and on the New York Stock Exchange, under the ticker symbol "LAC".

For further information contact:

Investor Relations

Telephone: 778-656-5820

Email: ir@lithiumamericas.com

Website: www.lithiumamericas.com

About Millennial

To find out more about Millennial Lithium Corp. please contact Brian Morrison at (604) 662-8184 or email info@millenniallithium.com.

NEITHER THE TSX VENTURE EXCHANGE NOR ITS REGULATION SERVICES PROVIDER (AS THAT TERM IS DEFINED IN THE POLICIES OF THE TSX VENTURE EXCHANGE) ACCEPTS RESPONSIBILITY FOR THE ADEQUACY OR ACCURACY OF THIS RELEASE.

This news release may contain certain "Forward-Looking Statements" within the meaning of the United States Private Securities Litigation Reform Act of 1995 and applicable Canadian securities laws. When used in this news release, the words "anticipate", "believe", "estimate", "expect", "target", "plan", "forecast", "may", "schedule" and similar words or expressions identify forward-looking statements or information. These forward-looking statements or information may relate to the LAC Transaction, including statements with respect to the expected benefits of the LAC Transaction to the Millennial Shareholders or Lithium Americas, the anticipated date of the LAC Meeting and mailing of the Circular in respect of the LAC Meeting, timing for Closing and receiving the required regulatory and court approvals, stock exchange and other approvals, the filing of materials on SEDAR, Lithium Americas' expectations in respect of the Pastos Grandes Project and successful integration into the business of Lithium Americas, the accuracy of pro forma ownership of LAC Shares by Voting Securityholders of Millennial; the accuracy of mineral resource and mineral reserve estimates at the Pastos Grandes Project and future plans and objectives of Lithium Americas. Lithium Americas' current plans, expectations and intentions with respect to development of its business and of the Pastos Grandes Project may be impacted by economic uncertainties arising out of COVID-19 pandemic or by the impact of current financial and other market conditions on its ability to secure further financing or funding of the Pastos Grandes Project.

Such statements represent Lithium Americas current views with respect to future events and are necessarily based upon a number of assumptions and estimates that, while considered reasonable by Lithium Americas, are inherently subject to significant business, economic, competitive, political and social risks, contingencies and uncertainties. Risks and uncertainties include, but are not limited to the following: ability of the parties to complete the LAC Transaction, the timing of any completion and the terms and conditions upon which the LAC Transaction is completed; ability to satisfy or waive all conditions to closing the LAC Transaction as set out in the LAC Arrangement Agreement; Millennial Voting Securityholders approving the LAC Transaction; the ability of the consolidated entity to realize the benefits anticipated from the LAC Transaction and the timing to realize such benefits; unanticipated changes in market price for LAC Shares; changes to Lithium Americas' current and future business plans and the strategic alternatives available to Lithium Americas; growth prospects and outlook of Lithium Americas' business, including commencing commercial production at the Cauchari-Olaroz project; favourable treatment of the transaction under applicable anti-competition laws; any impacts of COVID-19 on the business of the consolidated entity and the ability to advance the Pastos Grandes Project; stock market conditions generally; demand, supply and pricing for lithium; and general economic and political conditions in Canada, Argentina and other jurisdictions where Lithium Americas conducts business.

Additional risks, assumptions and other factors upon which forward-looking information is based, as it pertains to Lithium Americas and its business, are set out in Lithium Americas management discussion and analysis and most recent annual information form, copies of which are available under Lithium Americas profile on SEDAR at www.sedar.com.

Although Lithium Americas has attempted to identify important risks and assumptions, given the inherent uncertainties in such forward-looking information, there may be other factors that cause results to differ materially. Forward-looking information is made as of the date hereof and Lithium Americas does not intend, and expressly disclaims any obligation to update or revise the forward-looking information contained in this news release, except as required by applicable law. Accordingly, readers are cautioned not to place undue reliance on forward-looking information.

Many factors, both known and unknown, could cause results, performance or achievements to be materially different from the results, performance or achievements that are or may be expressed or implied by such forward-looking statements. Lithium Americas does not intend, and does not assume any obligation, to update these forward-looking statements or information to reflect changes in assumptions or changes in circumstances or any other events affecting such statements and information other than as required by applicable laws, rules and regulations.