Jen G's got her groove back!

Jennifer Garner has been secretly dating businessman and tech CEO John Miller, and it's been going on longer than you think!

"They’ve been together six months — and it’s getting pretty serious. Jen brings out the best in John, and he is the happiest he has probably ever been. It’s a loving, healthy relationship," a source dished to Us Weekly.

Her 40-year-old beau is the CEO of CaliGroup, a company that owns Miso Robotics and a chain of about 50 CaliBurger restaurants. He's a father to a 12-year-old son and 10-year-old daughter with his ex-wife, and they are still waiting on the final paperwork from their divorce to be finalized.

Proof this isn't just a fling? Miller has already met her three children with ex Ben Affleck!

Speaking of her former husband, he reportedly has no hard feelings about Jen moving on and just wants what's best for her.

"Ben and Jen have immense love and respect for one another. They still co-parent together and that will always come first. He will always be supportive of any decisions she makes and ultimately just wants her to be happy," a source added.

This is one lucky dude!