[Grammar] Article with "queen"

[englishhobby]

Should we use an article in the following sentences? (I have written them the way I think they are corerect.)
1. She is __Queen of Denmark.
2. She was crowned _____Queen of Denmark last year.
3. Who's that? - That's the Queen.

 

[Rover_KE]

1. Correct. 'She is the Queen of Denmark' is also correct.

2 and 3 are both correct.