Ashlee Simpson and Evan Ross "look out for each other".
The happy couple - who have three-year-old daughter Jagger together - are currently starring in their very own reality show 'Ashlee + Evan' which details their life as a family, and have said their romance works because they both know what the other person needs.
Evan, 30, said: "We're very different, but we understand each other and we look out for each other. We know how to work with each other to get through whatever we need to get through. And she's way too hot to stay mad at!"
Whilst 33-year-old Ashlee - who also has nine-year-old son Bronx from her previous marriage to Pete Wentz - added: "We don't hold onto things, which is good too. I love to keep that attraction part alive and fun. But with Evan, I don't have to try. He's the most handsome, fun person ever. He makes me feel so great about myself."
Despite their close bond, Ashlee admits there was still "a little bit of hesitation" when it came to the decision to broadcast their lives on television, but says they've "grown" as people since filming the show.
Speaking to People magazine, the 'Pieces of Me' singer said: "There was a little bit of a hesitation about doing the show. But we wanted to show our music and for people to get to know us. And for me it's been a long time. I've definitely grown as a person."
The couple - who have been married for four years - are no strangers to making their love public though, as they both recently took to social media to celebrate their wedding anniversary.
Posting a picture of the pair as they headed out to dinner, Ashlee wrote on Twitter: "Happy anniversary my love!! You make everything so fun, and beautiful!! I'm thankful for the day you walked into my life. I love you with all my heart. (sic)"
And Evan posted a professional snap of his spouse carrying their daughter and wrote: "HAPPY ANNIVERSARY MY LOVE. You are my life!!! Everyday with you is like a dream! 4 years with the love of my life!!!!!!! Obsessed with u! And thank you for this Angel Baby J. My ladies!! My loves (sic)"