Century Aluminum Company - Company Announcement (is)

Steelworkers Ratify Labor Agreement With Century Aluminum of Kentucky

MONTEREY, CA--(Marketwire - December 23, 2010) - Century Aluminum of Kentucky,
a wholly owned subsidiary of Century Aluminum Company (NASDAQ: CENX), announced
today that the membership of United Steelworkers Local 9423 has voted to ratify
a five-year labor agreement covering approximately 500 hourly workers at the
company's Hawesville, KY aluminum smelter. "We are pleased with this ratification vote," said plant manager Matt Powell."This was a positive step for Century, our workers and the local community."

Century Aluminum Company, the parent of Century Aluminum of Kentucky, owns
primary aluminum capacity in the United States and Iceland. Century's corporate
offices are located in Monterey, California. 

Cautionary Statement

This press release may contain "forward-looking statements" within the meaning
of U.S. federal securities laws. The company has based its forward-looking
statements on current expectations and projections about the future; however,
these statements are subject to risks, uncertainties and assumptions, any of
which could cause the company's actual results to differ materially from those
expressed in its forward-looking statements, including the ultimate effects of
the company's new five-year labor agreement with the United Steelworkers Local
9423. More information about these risks, uncertainties and assumptions can be
found in the risk factors and forward-looking statements cautionary language
contained in the company's Annual Report on Form 10-K and in other filings made
with the Securities and Exchange Commission. The company does not undertake,
and specifically disclaims, any obligation to revise any forward-looking
statements to reflect the occurrence of anticipated or una nticipated events or
circumstances after the date such forward-looking statements are made. 

Certified Advisors for the First North market of the NASDAQ OMX Iceland hf. for
Global Depositary Receipts in Iceland: 
Atli B. Gudmundsson, Senior Manager -- Corporate Finance, NBI hf.
Steingrimur Helgason, Director -- Corporate Finance, NBI hf.