Will Smith and his wife Jada Pinkett Smith have been together for 20 years.
And at the Los Angeles premiere of his film Concussion on Monday, the 47-year-old spoke to Entertainment Tonight about how they keep their relationship so strong.
'We've been married 20 years and we've been asking ourselves [what’s the secret to marriage] and really at the end of the day it’s just not quitting,' the star revealed.
'You can’t expect it to be easy,' Will continued, adding: '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.'
He also opened up on what he believes to be the secret to maintaining a good marriage, which is always working to be a better person.
'I would say is that we never went into working on our relationship,' He explained. 'We only ever worked on ourselves individually, and then presented ourselves to one another better than we were previously.'
Will and Jada - who started dating in 1995, tying the knot two years later - have been together for 20 years.
The longtime couple share 17-year-old son Jaden and 15-year-old daughter Willow - though Will also has 23-year-old son Trey (real name Willard Christopher Smith III) from his previous marriage to Sheree Zampino.
The duo are frequently plagued with divorce rumors, though they always shoot them down, with Will most recently refuting claims this past August with a Facebook post.
'So, in the interest of redundant, repetitious, over & over-again-ness... Jada and I are...NOT GETTING A DIVORCE!!!!!!!!!!!!!' the star emphatically wrote.
He continued: 'I promise you all - if I ever decide to divorce my Queen - I SWEAR I'll tell you myself! #Dumb People Should Have to Wear Scarlet D's.'
The Gotham alum echoed her husband's sentiments on Twitter, simply posting: 'My king has spoken