The cute couple hit the Children Mending Hearts charity benefit event in L.A. for some family time with daughters Violet and Seraphina.
But did their 2-month-old baby boy Samuel make his first public party debut?
Nope, Ben and Jen left their youngest one at home while at the do-gooder event.
Affleck arrived at the private residence with his mom Chris and his girls in tow while Garner showed up later in the afternoon. Violet, 6, and Seraphina, 3, spent most of the day making bracelets and doing arts and crafts with their grandma.
Tom Cruise and Nicole Kidmans teen son Connor deejayed the bash while Fatburger provided some of the yummy bites. Other guests included Tobey Maguire and wife Jennifer, Patricia Heaton, Sam Trammell and Happy Endings star Adam Pally, who hosted the event.
In other celebrity sightings news...
Rebecca Gayheart, Eric Dane, Michelle Trachtenberg, Jason Bateman, Julie Bowen, James Van Der Beek and Anthony Keidis all celebrated Earth Day at the launch of the new children's book Last Night I Swam With a Mermaid at the Annenberg Beach House in Santa Monica hosted by sea-loving scion Philippe Cousteau Jr.
Ginnifer Goodwin and Richard Gere stopped by the Getty Museum in L.A. seperately to check out famed photographer Herb Ritts' new art exhibit.
The Bionic Woman star Lindsay Wagner, was in the house when the original Wonder Woman, Lynda Carter, performed her new show Body & Soul this weekend at the Catalina Club in Hollywood.