Ashley Tisdale: 'Phineas & Ferb' Premiere!

Ashley Tisdale poses with a giant Phineas at the premiere of Phineas and Ferb: Across the 2nd Dimension on Wednesday (August 3) in Los Angeles.

The 26-year-old actress looked super cute in an AllSaints “Aztec” dress.

Here’s the synopsis of the film: Perry’s worst fear comes true when Phineas and Ferb finds out that he is in fact Secret Agent P, but that soon pales in comparison during a trip to the 2nd dimension where Perry finds out that Dr. Doofenshmirtz is truly evil and successful.

Phineas and Ferb: Across the 2nd Dimension airs on Friday, August 5 on the Disney Channel!