Can You Guess How Old The "Teens" In "Gossip Girl" Were In Season 1?

Things are never how they appear on the Upper East Side!

Almost TEN years ago, Gossip Girl premiered on September 19, 2007. Can you guess how old its actors were that first season?

The CW

Note: There aren't exact dates for when Gossip Girl began and finished filming Season 1 — but we know it started filming sometime in 2007. So for simplicity's sake, just guess how old the actors turned in 2007!