Aside from their acting ambitions, Karissa and Kristina Shannon really just want to make Hugh Hefner proud.

RadarOnline.com caught up with the spirited girls at this weekend's Comic-Con, where they described in vivid detail their first nude photo shoot and video production for boyfriend Hefner's magazine Playboy.

Click here to see the twins discuss their role in Sofia Coppola's new film.

To earn their sparkling necklaces and esteemed induction as Playmates, the twins got in the buff and washed one of Hefner's classic cars.

• TAGS

• Comic-Con
• Hugh Hefner
• Karissa Shannon
• Kristina Shannon
• Playboy
• Shannon Ttwins
• Sofia Coppola