Together Again! Jennifer Garner Kicking Bloated Ben Affleck's Butt Into Shape

Ben Affleck is back with Jennifer Garner…in the gym at least. RadarOnline.com has learned exclusively the bloated Batman star has enlisted his estranged wife to whip him back into fighting shape.

“Ben has always leaned on Jen to help him focus on a regime as well as prepare his gym routine and meal plans,” an insider told RadarOnline.com. “Since they split it’s no coincidence he’s let himself go so badly.”

Since officially divorcing Garner, 46, last year after a decade of marriage, Affleck, 45, has gotten cozy with SNL producer Lindsay Shookus.

But Affleck and Garner have been spending more quality time together recently, thanks to the involvement of their three children – daughters Violet, 12, Seraphina, 9 and son Samuel, 6.

“They’re on cordial terms right now because of the kids and since he’s in terrible shape she’s agreed to help him,” the insider confessed.

Affleck is likely in good hands with Garner, who sources say is in the best shape of her life.

“Jen’s in great shape at the moment herself having worked out like a demon ahead of her next movie,” the insider added.

Affleck’s workout regime reportedly includes a strict workout of cardio, weight and resistance exercises designed to sweat off fat and building muscle. Garner is also taking charge of his diet, putting him on a detox plan that includes smoothies made of veggies and fruit, along with a lot of lean protein like chicken and fish.