'Power Ballad' Courtesy of Dublin International Film Festival Share on Facebook Share on X Google Preferred Share to Flipboard Show additional share options Share on LinkedIn Share on Pinterest Share on Reddit Share on Tumblr Share on Whats App Send an Email Print the Article Post a Comment John Carney's musical-comedy Power Ballad, starring Nick Jonas and Paul Rudd, will world premiere as the closing film of this year's Dublin International Film Festival (DIFF), organizers said on Wednesday. And they highlighted that the two stars would be in attendance.