Transcript for 'Avengers: Endgame' sets records overseas
We turn to what could be the biggest box office opening ever, "Avengers: Endgame" hitting 4600 theaters across the country overnight and people have been lining up all night long to see it. In line for hours and the movie is already breaking records and T.J. Holmes is at a theater here in New York City, so, T.J., did you get to see it yet? Reporter: I have seen it, Cecilia and let me tell you what happens at the end. This is really come. No, of course, I can't reveal that the reason it has a chance to break all these records is because this is not just one movie with a few characters, fans have been along this journey since 200, 11 years ago and now this is the 22nd movie in the marvel universe so people are finally getting to see how this entire story ends. Fans were left devastated. The world's mightiest heroes vanished right before our eyes. We're in the end game now. Reporter: But today the suspense is finally over and the avengers are set to snap box office records into dust, 8,000 showtimes of the movie have already sold out. Theater chains are even adding more just to keep up with demand. We will. Reporter: And some lucky fans got the opportunity to see the biggest cinematic event. Do you trust me? I do. Reporter: The film is already setting records overseas and raising the possibility that it could become the highest grossing movie ever topping "Avatar" and "Star wars":the force awakens." The hype so huge some sat for hours to catch up on all 22 marvel films. Camping out for three days straight. We haven't left the theater whatsoever. Reporter: But today that wait is finally over. My head is going to explode off of my shoulders. Reporter: And for millions worldwide who have yet to see the movie, the message is clear. Please, do not spoil "Endgame." Okay, this is a big deal, people have been waiting 22 movies and 11 years to see how this ends. The directors actually put out a letter to fans pleading with them do not spoil this movie and there's a hashtag going around don't spoil "Endgame" so a couple folks, the first to see it and begging everybody not spoil it. I take it you won't spoil it, T.J.? Reporter: You know what, George, I'll send you an email. Text us. Thanks, T.J. We've been talking about it all morning, one of the avengers, apartmentman, Paul rudd will be here live in our next hour.
This transcript has been automatically generated and may not be 100% accurate.