Will Smith and his wife, Jada Pinkett Smith, have been married for 17 years
Credit: Jason LaVeris/FilmMagic

Will Smith and wife Jada Pinkett Smith have long endured divorce rumors, but the actor says there’s no end to their romance in sight – and he’s willing to share the secret to marital success.

“We’ve been asking ourselves [what’s the secret to marriage] and really at the end of the day it’s just not quitting,” Smith, 47, told Entertainment Tonight at the premiere of his latest movie, Concussion, on Monday.

The couple were wed in 1997 after about two years of dating, and the pair share two children, son Jaden, 17, and daughter Willow, 15. Smith also has a son from a previous relationship, Trey, 23.

“You can’t expect it to be easy,” the Oscar-nominee added, “it’s like our marriage was the most difficult, grueling, excruciating thing that we have ever taken on in our lives. And you know we’re just not quitters.”

Smith also told ET that “if there is a secret I would say it is that we never went into working on our relationship.”

“We only ever worked on ourselves individually,” he explained. “And then presented ourselves to one another better than we were previously.”

Will Smith on Divorce Reports: ‘If I Ever Decide to Divorce My Queen – I Swear I’ll Tell You Myself’

Back in August, Smith reassured fans that his relationship with the Magic Mike XXL star is solid, despite rumors to the contrary.

“Under normal circumstances, I don’t usually respond to foolishness. (Because it’s contagious),” Smith wrote on Facebook in response to the divorce speculation. But, after receiving what he called “deepest condolences” from friends, he decided to set the record straight.

“So, in the interest of redundant, repetitious, over & over-again-ness… Jada and I are…NOT GETTING A DIVORCE!!!!!!!!!!!!!” he declared.

The following month both stars used the social media network to express their affection for each other. On Pinkett Smith’s 44th birthday, the actor wrote “I’ve told you ‘I love you’ at least 8,285 times. And of the nearly 3.96 Billion women on the planet – there is only 1 that I want to spend the rest of my life with. Happy Birthday, my Love!”

On Smith’s own special day, his wife returned the sentiment, writing, “you have a 100 percent of my heart and for the rest of my days.”