Century Aluminum Company - Company Announcement

Century Aluminum Company Announces Proposed Offering of Senior Secured Notes

CHICAGO, IL--(Marketwired - May 20, 2013) - Century Aluminum Company (NASDAQ:
CENX) ("Century") announced today a proposed offering of $250 million aggregate
principal amount of senior secured notes due 2021 (the "2021 Notes"). Century
also announced today that it has commenced a cash tender offer for any and all
of its $249,603,550 outstanding principal amount of 8% Senior Secured Notes due
2014 (the "2014 Notes"). Century intends to use all net proceeds from the sale
of the 2021 Notes to repay all of its 2014 Notes. 

As the offering is a private placement, the 2021 Notes will be offered and sold
only to qualified institutional buyers in reliance on Rule 144A under the
Securities Act of 1933 (the "Securities Act") and to certain non-U.S. persons
in transactions outside the United States in reliance on Regulation S under the
Securities Act. The 2021 Notes to be offered have not been and will not be
registered under the Securities Act or any state securities laws and may not be
offered or sold in the United States absent registration or an applicable
exemption from registration requirements. 

This press release does not constitute an offer to sell or the solicitation of
an offer to buy any of the 2021 notes nor shall there be any sale of the 2021
notes in any jurisdiction in which such offer, solicitation or sale would be
unlawful. This press release is being issued pursuant to and in accordance with
Rule 135c under the Securities Act. 

This press release contains information about pending transactions, and there
can be no assurance that these transactions will be completed. 

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 certain forward-looking statements within the
meaning of the Securities Act of 1933 and the Securities Exchange Act of 1934.
Forward-looking statements are statements about future, not past, events and
involve certain important known and unknown risks, uncertainties and
assumptions, 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, declines in aluminum prices or
increases in our operating costs; worsening of global financial and economic
conditions; increases in global aluminum inventories and the addition of new or
restarted global aluminum production capacity; weakening of the company's U.S.
customer markets; our ability to successfully obtain long-term competitive
power arrangements for our U.S. plants, including access to the wholesale power
market for Hawesville and a favorable conclusion of the power negotiations for
Ravenswood; and our ability to successfully progress the potential restart of
our Ravenswood smelter. More information about these risks, uncertainties and
assumptions can be found in the risk factors and forward-looking statements
cautionary language contained in our filings with the Securities and Exchange
Commission, including Century's Form 10-K for the year ended December 31, 2012
and Form 10-Q for the quarter ended March 31, 2013. Consequently, the
forward-looking statements contained herein should not be regarded as
representations that the projected outcomes can or will be achieved, and 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.