Ben Affleck has secretly entered a rehab facility for the third time in just months — and RadarOnline.com has exclusive details of the troubled actor's new treatment plan in his ongoing battle with alcohol addiction.

The father of three, 45, checked into Passages treatment facility's 30-day program in Malibu, California, a well-placed source exclusively told Radar.

Affleck was spotted by eyewitnesses during an early morning walk outside the center on December 10.

Jennifer Garner and brother Casey Affleck were just relieved the Justice League star decided to get any sort of help again, the source claimed.

“Ben relapsed...Jen and Casey are willing to try anything, and they don’t care if the methods are controversial,” the insider explained.

Sources exclusively told Radar that although the Oscar-winner had been in outpatient therapy, to fight his addiction, Affleck needs "a constant support network" in order to stay sober.

third stay in an inpatient rehab in 2017, sources said.

The actor has had a tough 2017. In addition to his addiction battle, Garner finally filed divorce papers after a two-year separation.

he groped her breast during a Total Request Live appearance in 2003.

“I acted inappropriately toward Ms. Burton and I sincerely apologize,” he later said.

For more details on Affleck's treatment, keep reading Radar.

We pay for juicy info! Do you have a story for RadarOnline.com? Email us at tips@radaronline.com, or call us at 800-344-9598 any time, day or night.