Ben Affleck is "taking things day by day" in rehab.

Ben Affleck

Ben Affleck

The 'Batman vs Superman: Dawn of Justice' star has been doing really well with his treatment after checking himself into a treatment centre for alcohol addiction on August 22.

A source told People magazine: "He is doing much better but needs to continue receiving care. As difficult as it was to have his recent trip to rehab all play out so publicly, it now seems the way it happened was for the best. Ben seems to take this rehab visit more seriously. This time is different. He doesn't want his kids to have to go through this again. Ben is really trying very hard to get better. He is taking things day by day, but it seems he plans on staying at the treatment center for at least a couple of more weeks."

Meanwhile, it was previously revealed Ben "looks better and seems healthier" after two weeks in rehab.

The source shared: "On Saturday, Ben got a morning haircut at the Malibu Wave Salon, and also spent time at his Pacific Palisades house before returning to rehab. He had another workout session with a trainer. He has had a workout at home every day this week. He looks much better and seems healthier."

Whilst a second insider added: "He knows he needs to stay focused and listen to those around him."

Ben entered rehab after his ex-wife Jennifer Garner - with whom he has children Violet, 12, Seraphina, nine, and Samuel, six - staged an intervention, and she's said to be thrilled with his decision to give treatment a third try.

A source revealed: "He told Jen and was not resistant. He asked her to take him and she wanted to be there for him. She wants him to be clean and healthy and will help him get there if he's committed. She is glad he is in a safe place and getting the help he needs."