Amazon.com Inc announced its support for Sony Corp's Blu-ray format on Wednesday, days after Toshiba Corp pulled the plug on the rival HD DVD format, as key studios and retailers also took Blu-ray's side.
The online retailer said it would continue to sell HD DVD products for customers who already use that format.
Last month, Time Warner Inc's Warner Bros, which had backed both formats, voiced its exclusive support for Blu-ray.
Since then, General Electric Co's Universal Pictures, Wal-Mart Stores Inc, Best Buy Co Incand online video rental Netflix Inc have also taken Blu-ray's side.
(Reporting by Aarthi Sivaraman; Editing by Derek Caney)