The listing has nothing to do with the size of the role and that of the IMDB power rank of that actor. It was explained to be as follows:
The top billed actors are the first two, after that the other cast are listed in order of their "StarMeter" rating, which IMDb calculates somehow based on media mentions, site searches, projects, etc. I'm not exactly sure how. But it changes week to week. It is why, when you look at Stargate Atlantis movie, Jewel Staite shows up higher than Joe. Right now Amanda Tapping tops the list, with Jewel, Chris Heyerdahl and Jason Momoa (who have both had recent in-the-news projects) before Joe. A few months ago, Joe was second or third. Actually Patrick and Holbrook are also listed in order.
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The top billed actors are the first two, after that the other cast are listed in order of their "StarMeter" rating, which IMDb calculates somehow based on media mentions, site searches, projects, etc. I'm not exactly sure how. But it changes week to week.
It is why, when you look at Stargate Atlantis movie, Jewel Staite shows up higher than Joe. Right now Amanda Tapping tops the list, with Jewel, Chris Heyerdahl and Jason Momoa (who have both had recent in-the-news projects) before Joe. A few months ago, Joe was second or third.
Actually Patrick and Holbrook are also listed in order.