Jennifer Garner Reveals Which Movie Inspired Her 'Alias' Role, Addresses '13 Going on 30' Becoming a Classic & Gets Key to Her Hometown for Her Birthday on 'Drew Barrymore Show'

Jennifer Garner is having quite a birthday bash!

The newly 51-year-old actress made an appearance on The Drew Barrymore Show on Monday (April 17).

During her appearance, Jennifer Garner celebrated her special day with a surprise from host Drew Barrymore, as well as opening up about her beloved roles in Alias and 13 Going on 30.

Click through to see what Jennifer Garner had to say…