A source close to the Peppermint actress exclusively told Us Weekly that she has even "started dating someone new!"
The happy news comes just one month after she finalized her divorce from her wild ex following his most recent boozy relapse.
"She's ready to start the next phase of her life," added the insider.
RadarOnline.com readers know Garner, 46, and Affleck, 46, share three kids together and have gone to great lengths to co-parent them and take them on regular family outings.
"They're on the same page with giving the kids the best possible life," said the source. "They want to be the best co-parents they can be."
While the hard-partying actor quickly jumped into a serious relationship with Lindsay Shookus after his split from Garner — and most recently became involved in a fling with Playboy model Shauna Sexton — his love life has not turned out too well, and he's back to being a single man.
Who do you think is Jennifer Garner's new boyfriend? Let us know in the comments below!
We pay for juicy info! Do you have a story for RadarOnline.com? Email us at email@example.com, or call us at (866) ON-RADAR (667-2327) any time, day or night.
Get the exclusive celebrity scoop on all the stars you love before any of your friends by subscribing to our new podcast Straight Shuter below!