Can Jessica Alba save the world?

In Spy Kids 4: All the Time in the World -- which opens August 19 -- Alba plays a retired-spy. Now a full-time homemaker, it's up to her -- and her two step-kids -- to save the planet from an evil super villain.

In real-life Alba, 31, has a 3-year-old daughter, Honor, and is also mom to Haven Garner, who was born Saturday. Just two weeks before giving birth, the super-pregnant actress brought Honor along to the film's July 31 premiere in L.A. 

If you'd rather stay inside then hit the theaters this weekend, Phineas and Ferb The Movie: Across the 2nd Dimension, premieres Saturday on ABC. In this kooky Disney cartoon, Phineas, Ferb and their pet platypus Perry find themselves in an alternate universe ruled by mad scientist, Dr. Doofenshmirtz.

The duo's older sister, Candace Flynn, is voiced by Ashley Tisdale. The actress, 26, is also known for her role as Sharpay in the High School Musical franchise.

Phineas and Ferb The Movie: Across the 2nd Dimension airs Saturday at 8 p.m. EST.

For more on these and other must-see weekend moments, check out Us' Movies, TV and Music channel now!