A List Of Things Thrown Five Minutes Ago

I'M JUST A BILL: From the Corrections in Sunday's New York Times Arts & Leisure section: "A listing last Sunday in Summer Movies for "Thunderbirds," scheduled to open on July 30, misidentified the actor who plays Jeff Tracy. He is Bill Paxton, not Bill Pullman."

Are there any two more interchangeable "name" actors on the planet? I'm talking about actors whose names you actually know, not actors who you know as "that guy." Of the 23 movies listed below, which starred Paxton and which Pullman? I'll post the answers in the comments.

1. "Twister"
2. "Independence Day"
3. "The Last Seduction"
4. "The Last Supper"
5. "Wyatt Earp"
6."Tombstone"
7. "Titanic"
8. "U-571"
9. "Lake Placid"
10. "Lost Highway"
11. "A Simple Plan"
12. "Brokedown Palace"
13. "Apollo 13"
14. "Sleepless in Seattle"
15. "Mighty Joe Young"
16. "Casper"
17. "Boxing Helena"
18. "Singles"
19. "Mr. Wrong"
20. "Spaceballs"
21. "Weird Science"
22. "Brain Dead"