Lisa Rinna and Harry Hamlin are about to celebrate their 21st wedding anniversary on March 29. Staying married for more than two decades in Hollywood is no small feat. But then again, seeing how perfect Lisa and Harry are for each other on The Real Housewives of Beverly Hills, it's really no surprise that this couple is still going strong.

And now we know how Lisa and Harry have been able to maintain such a long-lasting relationship over the years. Lisa revealed the "secret" to her marriage when she appeared on LIVE with Kelly and Ryan as the show filmed from the Bahamas on Thursday. "I don't know, I'm the third wife. Three times is a charm, maybe," Lisa joked, referring to Harry's previous marriages to actresses Laura Johnson and Nicollette Sheridan. "Yeah, so I think just because it's me."





In fact, Lisa isn't exactly sure why she and Harry work so well together. "You know, we're so opposite. We have nothing in common, and I truly mean that, like zero," she told Kelly Ripa and Ryan Seacrest. "He's like an astronaut. Like, he is into rockets and astrophysics. I'm into shopping."

But in all seriousness, Lisa told The Daily Dish in 2015 that there really isn't "a secret" to keeping the spark alive in their marriage for all these years. "It's just work. It takes work. It takes communication," she explained. "It takes some luck [laughs], a lot of mutual respect. I think we got really, really lucky."

Watch Lisa dish more on her marriage, below.