What Teenage Actress Could Play Gwen If TDI Was Not Animated?

That's a good one, soxfan!
Gwen's appearance was inspired after Tibby from the sisterhood of the traveling pants so I think Amber Tamblyn(she played tibby in the movie)

Mary Elizabeth Winstead I think Change her hair colour a bit and you've got a Gwen. Also her character in the movie Scott Pilgrim is Mysterious, Gothy and Awesome just like gwen!

the girl who plays ganace on mean girls

My Guess Would Be Kristen Koppel. She Looks Like Her. She's The Girl That Played Sarah From One Of The Bring It On Movies

idk any

i would say selena gomez yeah her