Just like in "Juno," Jennifer Garner wants to be a mom.

In the upcoming family film "The Odd Life of Timothy Green," she and Joel Edgerton play a married couple who can't bear children. One day, they make a wish and magical little boy (C.J. Adams) comes into their lives.

HitFix's Gregory Ellwood sat down with the star to discuss the film. Watch the video above. 

"This is the first time I really played a mom," Garner says, explaining what drew her to the project. She also notes that she loved the quirkiness of the script, while acknowledging the film's realist tone that viewers can relate to. "Tinothy Green" walks a fine line between fantasy and reality, a dichotomy of which, Garner says, she and the rest of the cast and crew were constantly aware. "You have to be really clear about what the rules have to be," she explains. 

C.J. Adams, who plays the title character, impressed Garner with his ten-year-old acting chops. As did the film's noted cinematographer, John Toll ("The Thin Red Line").

"The Odd Life of Timothy Green" opens nationwide August 15.