How old was Blake Lively at the beginning of Gossip Girl?

Related questions

1. Does Gossip Girl have a happy ending?
2. Is Blake Lively a twin?
3. Is Georgina really pregnant with Dan's baby?
4. Who is Blair's baby daddy?
5. Is Milo Humphrey really Dan's son?
6. Is Jack Chuck's dad?
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10. Why did they change Blair's mom in Gossip Girl?

Tags

1. #blake
2. #earned
3. #traveling
4. #ellender
5. #lively
6. #serena
7. #known
8. #actress
9. #pants
10. #august
11. #woodsen
12. #brown
13. #accepted
14. #sisterhood
15. #breakthrough
16. #films
17. #starring
18. #gossip
19. #starred
20. #american