After 45 years in limelight, Joan Rivers is showing no signs of slowing down, thanks to a new documentary that is already winning raves -- and awards.

According to the Hollywood Reporter, IFC Films has won a bidding war for the North American rights to Ricki Stern and Annie Sundberg's documentary 'Joan Rivers: A Piece of Work.' It premiered at the Sundance Film Festival last week and won the fest's award for U.S. Documentary Editing. As you might guess, the film takes a closer look at the private life of the famous comedienne, who recently returned to E! as the network's fearless style expert. After 45 years in limelight, Joan Rivers is showing no signs of slowing down, thanks to a new documentary that is already winning raves -- and awards.

According to the Hollywood Reporter, IFC Films has won a bidding war for the North American rights to Ricki Stern and Annie Sundberg's documentary 'Joan Rivers: A Piece of Work.' It premiered at the Sundance Film Festival last week and won the fest's award for U.S. Documentary Editing. As you might guess, the film takes a closer look at the private life of the famous comedienne, who recently returned to E! as the network's fearless style expert.

At 76, Rivers still embodies everything that makes today's reality TV so popular: brutal honestly, petty drama, celebrity obsession and outrageous characters (Don't believe us? Just ask her 'Celebrity Apprentice' rival, Annie Duke.) Today, Rivers remains an important figure for female comedians, having blazed the trail for the likes of Ellen DeGeneres, Chelsea Handler and Sarah Silverman, and continues to win people over with her quick wit. In its review of the film at Sundance, the Hollywood Reporter said the movie had "plenty of laughs while proving there's more to Rivers than plastic surgery jokes and red-carpet chatter."

EW.com, meanwhile, called the movie "sharp" and "irresistible."

Directors Sundberg and Stern premiered two other documentaries at Sudnance: 'The Devil Came on Horseback' and 'The Trials of Darryl Hunt.' Meet them below: