Video-sharing app Viddy now backed by Jay-Z, Biz Stone

Viddy, a fast-growing iPhone (s aapl) app for editing and sharing short mobile videos, has added a little A-list tech and entertainment celebrity backing to go with its recently procured Series A funding.

The Venice, Calif.-based company announced Monday that Overbrook Entertainment, the production company co-founded by actor Will Smith, has been added to its list of investors and partners.

Also brought in: Roc Nation, the music artist management company co-founded by hip-hop mogul Jay-Z, as well as one of Roc Nation’s signature clients, singer-songwriter Shakira.

On the technology side, Viddy now lists Twitter co-founder Biz Stone as a supporter, as well as Brian Lee, founder of ShoeDazzle, and Josh James, founder of Omniture.

The backing follows Viddy’s February announcement that it had secured $6 million in Series A round funding from Battery Ventures, Greycroft Ventures and Qualcomm.

Since its introduction of this free “Instagram-for-video” service in April of last year, Viddy has attracted 10 million registered users and says its now adding 300,000 more each day.

The support of well-knowns has been instrumental to Viddy’s growth, with spikes in usage tied to public pronouncements from the likes of Snoop Dogg, Linkin Park and Bill Cosby that they, too, use the service.