The sentence which is underlined change to passive voice.

1. I had read the novel
~> The novel had been read by me

2. I could not wait to watch the movie
~> The movie could not be waited to be watched by me

3. I found out that the cast of dilan 1991
~> The  cast of Dilan 1991 are found out by me

4. I would not miss this chance to meet my idol, Iqbaal
~> This chance wouldnt be missed by me to meet my idol, Iqbaal

5. Mostly teenagers, attended the event
~> The event is attended by mostly teenagers

6. My friends and I took the seats at the front row
~> The seats at the front row was took by us

7. To meet our idol, we continue to be enthusiastic
~> Being enthusiastic was continued to meet our idol by us

8. We cheer their names
~> Their name was cheered by us

9. I could meet my idol
~> My idol could meet by me

10. The cast describe the movie briefly
~> The movie was described briefly by the cast

11. I raised my hand
~> My hand was raised by me

12. He developed his character as Dilan
~> His character as a Dilan was developed by him