Michael Douglas on Catherine Zeta-Jones: 'We're Stronger Than Ever' Post-Separation

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Though they've had their very public ups and downs, Michael Douglas and Catherine Zeta-Jones are now doing better than ever.

The 70-year-old actor recently sat down with Ellen DeGeneres, which airs Thursday, and gave an update on his marriage to the 45-year-old The Legend of Zorro star. The two tied the knot in 2000, but separated in August 2013, reportedly due to stress from Douglas' 2010 cancer battle and her struggles with bipolar II disorder. However, they were reportedly back together by that November, and walked the red carpet as a couple last April.

"If both of you are willing, you know, to do it. It can't be a one-way street," Douglas says about making their marriage work following the break. "But I'm crazy about her, and yeah, I think every couple has their difficult times."

"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," he points out. "But we're back stronger than ever."

PHOTOS: Rekindled Romances in Hollywood

Now, the two are looking forward to celebrating their 15th wedding anniversary in November -- though Douglas admits to needing a little help when it comes to remembering the details.

"I have to thank your team backstage who said, 'I'm so happy to see that you have your 15th wedding anniversary coming up,'" he tells Ellen. "I said, 'No, my 14th wedding anniversary.' And they were very polite and said, 'I think it's your 15th wedding anniversary.' I said no ... and oh my goodness, it is my 15th anniversary!"

"So thank you very much for that," he jokes. "Saved me, yeah."

VIDEO: Watch Michael Douglas Sneak Up on His Legendary Dad

Last November, Michael introduced the world to his stunt double of 26 years, Michael Runyard, who he just so happens to be adorable besties with. Watch below!

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