Century Aluminum Company - Company Announcement

Century Aluminum Completes Acquisition of Sebree, KY Smelter

CHICAGO, IL--(Marketwired - June 03, 2013) - Century Aluminum Company (NASDAQ:
CENX) announced today that its wholly owned subsidiary has completed the
transaction with Rio Tinto Alcan, Inc. to acquire substantially all of the
assets of the Sebree aluminum smelter. The Sebree smelter, located in Henderson
County, Kentucky, employs over 500 people and has an annual production capacity
of 205,000 metric tons of primary aluminum. "We are really happy to welcome the men and women of Sebree to Century,"
commented Michael Bless, President and CEO. "With the changes occurring in U.S.
energy markets, we believe Sebree, along with our existing smelter at
Hawesville, will be competitive in the global market. We see a great
opportunity for these facilities, which are located about 60 miles apart, to
work together and share best practices in pursuit of safety and operational
excellence. "Access to market-based power is a critical enabler for sustained operations at
Hawesville and Sebree. We believe the framework reached with the power provider
for market-priced energy for Hawesville will serve as a model for Sebree."

Century Aluminum Company owns primary aluminum capacity in the United States
and Iceland. Century's corporate offices are located in Chicago, Illinois. More
information can be found at www.centuryaluminum.com. 

Cautionary Statement
This press release contains "forward-looking statements" within the meaning of
the Private Securities Litigation Reform Act of 1995. 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.
Such risks and uncertainties may include, without limitation, further declines
in aluminum prices or increases in our operating costs; worsening of global
financial and economic conditions; and our ability to successfully obtain
long-term competitive power arrangements for the Hawesville and Sebree plants.
Forward-looking statements in this press release include statements regarding
our ability to derive benefits from the common ownership of the Sebree and
Hawesville plants and obtain competitive power contracts for the Hawesville and
Sebree plants. More information about these risks, uncertainties and
assumptions 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. 

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.


Century Aluminum Contacts:

Mike Dildine (media)
831-642-9364

Shelly Harrison (investors)
831-642-9357