ICC Extends Deadline for Arbitration Decision

VANCOUVER, BRITISH COLUMBIA -- (Marketwire) -- 04/29/11 -- MAG Silver Corp. (TSX: MAG)(NYSE Amex: MVG) ('MAG' or the 'Company') announced today that it has received notification from the International Court of Arbitration (the 'ICC') that the deadline for a decision in the arbitration between MAG and its joint venture partner, Fresnillo plc, has been extended by the ICC from April 30, 2011 to May 31, 2011. MAG had previously reported that all procedural aspects of the arbitration were completed in December, 2010 and had been informed by the ICC that a decision would be announced by April 30, 2011.

About MAG Silver Corp. (www.magsilver.com)

MAG is focused on district scale projects located within the Mexican Silver Belt. Our mission is to become one of the premier companies in the silver mining industry. MAG is conducting ongoing exploration of its portfolio of 100% owned properties in Mexico including a silver, lead and zinc discovery and a moly-gold discovery at its 100% owned Cinco de Mayo property in Chihuahua State. MAG and Fresnillo plc are jointly developing the Valdecanas Deposit on the Juanicipio Joint Venture in Zacatecas State. MAG is based in Vancouver, British Columbia, Canada. Its common shares trade on the TSX under the symbol MAG and on the NYSE Alternext under the symbol MVG.

On behalf of the Board of

MAG SILVER CORP.

Dan MacInnis, President and CEO

This release includes certain statements that may be deemed to be 'forward-looking statements' within the meaning of the US Private Securities Litigation Reform Act of 1995. All statements in this release, other than statements of historical facts are forward looking statements, including statements that address future mineral production, reserve potential, exploration drilling, exploitation activities and events or developments. Forward-looking statements are often, but not always, identified by the use of words such as 'seek', 'anticipate', 'plan', 'continue', 'estimate', 'expect', 'may', 'will', 'project', 'predict', 'potential', 'targeting', 'intend', 'could', 'might', 'should', 'believe' and similar expressions. These statements involve known and unknown risks, uncertainties and other factors that may cause actual results or events to differ materially from those anticipated in such forward-looking statements. Although MAG believes the expectations expressed in such forward-looking statements are based on reasonable assumptions, such statements are not guarantees of future performance and actual results or developments may differ materially from those in the forward-looking statements. Factors that could cause actual results to differ materially from those in forward-looking statements include, but are not limited to, changes in commodities prices, changes in mineral production performance, exploitation and exploration successes, continued availability of capital and financing, and general economic, market or business conditions, political risk, currency risk and capital cost inflation. In addition, forward-looking statements are subject to various risks, including that data is incomplete and considerable additional work will be required to complete further evaluation, including but not limited to drilling, engineering and socio-economic studies and investment. The reader is referred to the Company's filings with the SEC and Canadian securities regulators for disclosure regarding these and other risk factors. There is no certainty that any forward looking statement will come to pass and investors should not place undue reliance upon forward-looking statements.

Please Note:

Investors are urged to consider closely the disclosures in MAG's annual and quarterly reports and other public filings, accessible through the Internet at www.sedar.com and www.sec.gov/edgar/searchedgar/companysearch.html.

Neither the Toronto Stock Exchange nor the New York Stock Exchange Alternext US LLC has reviewed or accepted responsibility for the accuracy or adequacy of this press release, which has been prepared by management.

Contacts:

MAG Silver Corp.

Gordon Neal

VP Corp. Development

(604) 630-1399 or Toll Free: (866) 630-1399

(604) 681-0894 (FAX)
info@magsilver.com
www.magsilver.com