In twilight who plays Bella?

The character of Jessica Stanley in 'Twilight' was played by Anna Kendrick.

A classmate of Bella's, and Bella's first friend in Forks, she filled Bella in on the Cullens on her first day at school. Bella often forgot her name during the first few days of school. She tends to be more interested in Bella's popularity than Bella's actual character, and is sometimes jealous of Mike's affections toward Bella. She also took both Spanish and Trig with Bella during their Junior year.