Google's SVP of Androids, Apps and Chrome, Sundar Pichai, shared the information during a keynote speech at South by Southwest (SXSW) in Austin, Texas over the weekend, according to The Next Web.
Google could not be immediately reached for comment for this story.
While Google remains mum on specific sales figures for the USB flash-like device, customers have apparently bought "millions" of the device. Sales continue to grow rapidly, the article says.
Last week Roku launched the Roku Streaming Stick device for $49.99, which competes directly with Chromecast. The device will be available in April, but the Streaming Stick is available now for pre-order on Roku's Web site, on Amazon (AMZN) and online at Best Buy (BBY) and Wal-Mart (WMT).
--Written by Laurie Kulikowski in New York.