The couple briefly separated in 2013, after each battled some health issues -- Catherine was seeking medical help for her bipolar disorder just months before the split and in 2010, Douglas was treated for cancer.
Nevertheless, it seems like both A-listers are happy and healthy these days ... even though it was a bit of a struggle to get to this place.
"It can't be a one-way street, but I'm crazy about her and yeah I think every couple has their difficult times," Douglas tells Ellen about overcoming their marital issues. "The only problem is, as you well know, we're all in the public eye and it tends to get a little more exposed than most. But we're back stronger than ever."
The cute couple will also celebrate their 15th wedding anniversary this November!
"I have to thank your team back stage team who said 'I'm so happy to see that you have your 15th wedding anniversary coming up.' I said 'No, my 14th wedding anniversary' and they were very polite and said 'I think it's your 15th wedding anniversary,'" the actor reveals. "I said no, I went '19 ... and Oh my goodness it is my 15th anniversary!' So thank you very much for that. Saved me the, yeah."
We're happy to see that Michael and Catherine are in a great place these days -- what do you think about the "Wall Street" star's candid comments? Tell toofab below and check out the gallery above to see even more of Hollywood's hottest couples!