Century Aluminum Company - Company Announcement

Century Aluminum USW Ratifies New Contract at Hawesville, Kentucky Smelter

Five-Year Agreement Effective Through April 1, 2020

CHICAGO, IL--(Marketwired - June 12, 2015) - Century Aluminum of Kentucky
General Partnership (the "Company"), a subsidiary of Century Aluminum Company
(NASDAQ: CENX) ("Century"), announced today that a new, five-year collective
bargaining agreement was ratified by the United Steelworkers Local 9423 on June
11, 2015 for the Company's Hawesville, Kentucky smelter. The new contract is
effective today through April 1, 2020. "We welcome this positive development for the smelter, its entire workforce and
the community," commented Mike Bless, CEO and John Hoerner, SVP North American
Operations. "Century's employees have always been and will always be a critical
part of our success. We now look forward to working with everyone who shares
our commitment to make the Hawesville plant the safest and most productive
business it can be."

Workers will return to their regular shifts beginning Monday, June 15 at 7 a.m.

About Century Aluminum
Century Aluminum Company owns primary aluminum capacity in the United States
and Iceland. Century's corporate offices are located in Chicago, IL. 

Visit www.centuryaluminum.com for more information.

Certified Advisors for the First North market of the OMX Nordic Exchange
Iceland hf. for Global Depositary Receipts in Iceland: 

Atli B. Gudmundsson, Senior Manager -- Corporate Finance, Landsbankinn hf.Steingrimur Helgason, Director -- Corporate Finance, Landsbankinn hf.

Cautionary Statement
This press release contains "forward-looking statements" within the meaning of
the Private Securities Litigation Reform Act of 1995, which are subject to the"safe harbor" created by section 27A of the Securities Act of 1933, as amended
(the "Securities Act"), and section 21E of the Securities Exchange Act of 1934,
as amended (the "Exchange Act"). Forward-looking statements are statements
about future, not past, events and involve certain important risks and
uncertainties, any of which could cause our actual results to differ materially
from those expressed in our forward-looking statements. These forward-looking
statements may be identified by the words "believe,""expect,""anticipate,""intend,""plan,""estimate,""forecast" or words of similar meaning, or future
or conditional verbs such as "will,""would,""should,""could,""might," or"may." Forward-looking statements in this press release include, without
limitation, statements with respect to the ultimate effects of the new
collective bargaining agreement with the labor union at our Hawesville,
Kentucky smelter. More information about the risks, uncertainties and
assumptions affecting the Company can be found in the risk factors and
forward-looking statements cautionary language contained in our Annual Report
on Form 10-K and in other filings made with the Securities and Exchange
Commission. We do not undertake, and specifically disclaim, any obligation to
revise any forward-looking statements to reflect the occurrence of future
events or circumstances. 


Century Aluminum Contacts:
Kenny Barkley (media)
270.521.7424

Peter Trpkovski (investors)
312.696.3112