Did she have this baby by herself?! He looks nothing like daddy Ben Affleck!

Jennifer Garner went on a walk with her look-a-like baby boy Samuel this morning, and we can't get over how cute the little tyke looks in his moose onesie!

Jen G is reportedly in talks to join the cast of the film Alexander and the Terrible, Horrible, No Good, Very Bad Day, according to THR. The flick is an adaptation of the popular children's book about a boy who has a terrible day and wishes his family experienced his suffering.

The brunette beauty's rumored co-star is none other than Steve Carell!