PARK CITY -- A documentary spotlighting an Internet revolutionary and a gritty drama about a teenager's struggle to grow up in Harlem won the top prizes at the 25th Sundance Film Festival here Saturday.

Ondi Timonder's "We Live In Public" won the grand jury documentary top prize while "Push," an adaptation of the novel by Sapphire directed by Lee Daniels and Damien Paul won the jury prize for dramatic feature.

"This has been a truly remarkable year for Sundance in ways even we did not fully predict," said Sundance director Geoffrey Gilmore after awards at the world's most important independent film festival were revealed.

"People ask us how independent film has evolved over the past 25 years and the answer is, quite simply, it's better."

Other notable winners on Saturday included "The Cove," the documentary about a heavily guarded dolphin farm near a small coastal village in Japan, which took the audience award in US documentary.

The Sundance Film Festival is the premier showcase for US and international independent film held each January in and around Park City, Utah.

The annual festival presents 120 dramatic and documentary feature-length films in seven categories.

Founded by Robert Redford in 1981, the Sundance Institute is a not-for-profit organization created to develop original storytelling, film and theatre and presents the annual Sundance Film Festival.