After opening with $31.7 million internationally last week, J.J. Abrams' sci-fi sequel Star Trek Into Darkness, featuring Chris Pine, Zachary Quinto, Zoe Saldana, Karl Urban, John Cho, Simon Pegg and more as the crew of the U.S.S. Enterprise and Benedict Cumberbatch as their latest adversary, opened on Thursday in North America. After making roughly $13.5 million in its opening day, it went on to gross an estimated $70.4 million over the weekend. That $83.9 million made over four days is only slightly more than the $79 million the original movie made in its first three days.

That might seem somewhat disconcerting for a movie that at one point was thought to be one of the $100 million openers of the summer, although it's been doing great international business. So far it's grossed $80.5 million internationally playing in 40 markets which is up almost 80% from the first movie and it's doing 33% better than the reboot with a worldwide total now at $164.5 million. Of its $70.5 million "Star Trek" made this weekend, $13.5 million of that came from 336 IMAX theaters with the draw of Abrams having shot over 30 minutes of footage using IMAX cameras something that's only been done by Christopher Nolan for the "Dark Knight" movies and Brad Bird for Mission: Impossible - Ghost Protocol.

As has become the tradition for the summer of 2013, Universal Pictures' Fast & Furious 6 opened a week earlier internationally than its domestic release, debuting in the UK and Ireland (where the movie takes place) and grossing roughly $13.8 million in 460 theaters, making it Universal's biggest opening in those two territories even over last year's Les Miserables. It opened bigger than last week's Star Trek Into Darkness but less than the previous week's Iron Man 3 opening. Fast & Furious 6 opens in North America and 59 other territories this coming Friday.

Marvel Studios' Iron Man 3, starring Robert Downey Jr., crossed the $300 million mark domestically on Thursday and then added another $35.2 million over the weekend, down another 52% from the previous weekend. Then again, it's grossed $337 domestically and it just passed the ONE BILLION mark worldwide. It grossed another $40.2 million internationally where it's generally holding stronger and where the $736.2 million grossed overseas has helped bring it to $1073 million since opening last month.

Baz Luhrmann's The Great Gatsby, starring Leonardo DiCaprio, Tobey Maguire, Carey Mulligan, Joel Edgerton, Isla Fisher and Jason Clarke, dropped to third place with $23.4 million, down 53% from its impressive opening weekend. It has grossed $90.2 million domestically, Baz's best showing in North America so far.

Only one other movie grossed more than $3 million this weekend and that was Michael Bay's Pain & Gain (Paramount) with $3.1 million, having grossed $46.6 million since opening a month ago.

Basically, the rest of the Top 9 went as follows with DreamWorks Animation's The Croods, the Jackie Robinson biopic 42 (Warner Bros.), Tom Cruise's Oblivion (Universal), Jeff Nichols' Mud (Roadside Attractions) and Peeples all grossing between $2.1 and 2.8 million. You can check out the chart for total grosses.

The Top 10 grossed an estimated $145 million which was up 8% from last year when Peter Berg's Battleship and Sacha Baron Cohen's The Dictator both disappointed with $25.5 million and $17.4 million, respectively.

Noah Baumbach's new movie Frances Ha (IFC Films), starring and co-written by Greta Gerwig, opened in four theaters in New York and Los Angeles where it brought in $135 thousand.

Click here for the full box office estimates of the top 12 films.