Running Time

I'm very excited to see this movie. I have my tickets for this Monday at 7pm. I called the theather and the recording said the movie was 1 hour 48 minutes long. that was confermed by movietickets.com which is where i bought the tickets. I knew that had to be somewhat wrong considering they are showing the movie every 3 or so hours, so i went onto movietickets.com and they had a 2 hour 30 minute running time posted. Not that it's a huge deal with how long this movie is, i just really want to know which one is right. So, for anyone who saw the film, please respond back. Thank you