She has also guest-starred in nine episodes of Wizards of Waverly Place as Juliet van Heusen, a vampire that Justin Russo (David Henrie) falls in love with.
In the same year, She was in the film Alvin and the Chipmunks: The Squeakquel.
CLICK HERE FOR UNLIKELY COUPLES YOU WON'T BELIEVE DATED!
I’m not going to say it was his fault, I think we were both young. I don’t know, maybe he was just too boisterous or something and I was just lame and I thought I was too good,” she said.
In 2011, she co-wrote and sang the Disney's Friends for Change Games anthem called "We Can Change the World".
That same year, she co-starred with Lindsay Lohan in the film Labor Pains.
We had such a great experience working on the movie, and they tried to figure something out for a sequel, but everyone at Disney felt like the movie had completed its story in the first movie.
It was a great experience, and I loved working with the cast members and still see them frequently." In 2010, Mendler's credits as a singer include the theme song for Good Luck Charlie, entitled "Hang In There, Baby." She also sang a cover of "When She Loved Me" from Toy Story 2 for the Disney Mania 7 album.
She is signed to American label Hollywood Records and her first single, "Ready or Not", was released on August 7, 2012, with her debut album, Hello My Name Is..., released on October 22, 2012. On the decision, Mendler stated "I was 11 when I did a play out in Northern California and I really enjoyed it and I decided that I wanted to pursue a career and so I got an agent and did commercials and voice-overs and that sort of thing." She became the youngest performer in the San Francisco Fringe Festival. Mendler had a San Francisco agent when she was 11 years old. In that same year, she provided the voice of Thorn in the video game, Bone: The Great Cow Race.
When she was thirteen, she began working in the Los Angeles market, landing her first L. In 2007, Mendler played the role of Pamela Jones in the film Alice Upside Down and in 2008, Mendler played the role of Kristen Gregory in the film The Clique.
She also starred as Teddy Duncan in the Disney Channel Original Movie, Good Luck Charlie, It's Christmas! In the same year, she appeared in Disney's Friends for Change Games (where she was the Yellow Team captain), So Random!