How many people were in the simpsons movie and who they?

There are a total of 16 main characters who appear in The Simpsons Movie. Here are the names of the characters and their voice actors:

1. Homer Simpson - Dan Castellaneta

2. Marge Simpson - Julie Kavner

3. Bart Simpson - Nancy Cartwright

4. Lisa Simpson - Yeardley Smith

5. Maggie Simpson - Nancy Cartwright

6. Grandpa Abe Simpson - Dan Castellaneta

7. Moe Szyslak - Hank Azaria

8. Lenny Leonard - Harry Shearer

9. Carl Carlson - Hank Azaria

10. Milhouse Van Houten - Pamela Hayden

11. Nelson Muntz - Nancy Cartwright

12. Ralph Wiggum - Nancy Cartwright

13. Martin Prince - Russi Taylor

14. Ed Flanders - Harry Shearer

15. Ned Flanders - Harry Shearer

16. Apu Nahasapeemapetilon - Hank Azaria