The dynamic duo was spotted on Wednedsay, October 20, while they walked hand-in-hand enjoying a sunny day in Santa Monica.
Samuel, 9, is the youngest of Garner's three children who she shares with ex-husband Ben Affleck. The pair also share two daughters: Violet, 15, and Seraphina, 12.
The activist mama — who co-founded Once Upon a Farm, an organic baby food brand — previously spoke out about the difficulties of motherhood during the COVID-19 pandemic, admitting, "this has been such a hard year for moms".
'We have had to say 'No, no, no.' We've had to watch our kids be home, miss out on things," Garner said earlier this year while promoting her family film, Yes Day.
The Alias alum shared that watching her kids be "isolated on Zoom" all day long instead of out frolicking with friends was "hard."
It seems the mom-of-three can't seem to get enough one-on-one time with her son, as the pair have recently been photographed running errands all over Los Angeles together.
Garner was previously spotted shopping around a farmer's market with her blonde-haired boy helping her pick out produce.
Scroll through the photos below to check out Jennifer Garner's latest outing with her little youngster!
The happy mama showed off her dimples with a big smile on her face while she walked alongside her son.
Samuel was dressed in an all-navy blue outfit with a sweatshirt tied around his wasit and a purple hat in his hand.
The famous mama also rocked lighwash jeans and a pair of tan sneaks while going mask-less for the outing.