01/26/2013 at 12:50 PM EST
's much-hyped movie jOBS
premiered at the Sundance Film Festival
on Friday, and the star was on hand – minus girlfriend Mila Kunis
– for all the festivities.
Kutcher was one of the first to arrive at the official after party, hosted by Nur Khan Presents NK on Main Street for the cast and filmmakers and sponsored by Red Touch Media.
Kutcher was captivated by a floor-to-ceiling portrait of late Apple visionary Steve Jobs
, whom Kutcher portrays in the film. Guests were quick to snap a photo of the actor admiring the subject of his role.
Without Kunis by his side, Kutcher very much remained a one-man guy, focusing his attention all night on his table of male friends and colleagues and posing for pictures with fans, according to an observer. The pride he takes in jOBS
was palpable, as Kutcher was incredibly excited to chat about his film and role with all the guests who came up to greet him.
Costar Ahna O'Reilly spent the evening in a very social mood, dancing to the beats of DJ Cash and catching up with co-star Josh Gad. Not to live down his "funny man" persona, Gad went into the evening entertaining all the guests and causing an uproar of laughter with Kutcher and O'Reilly while catching up about filming and their time at Sundance.
– Jennifer Garcia