Billy Crystal attributes his 54-year marriage to his wife to a shared common goal.

Billy Crystal revealed the secrets behind his decades-long marriage to  wife Janice.

The 76-year-old actor and the 75-year-old producer, who share daughters Jennifer, 51, and Lindsay, 46, have been married 54 years since they met as teenagers.

In an interview with Planet Chronicle Digital, Crystal, who executive produced and starred in the new Apple+ series "Before," discussed the key qualities and shared goals that have kept his marriage going strong over the years.

"When Harry Met Sally" star stated that humor, trust, and being interested in what each of us is doing while respecting our separate lives and who we are are essential.

""Our common goal was always to raise a beautiful family and respect each other, which we have and continue to do, and she's an extraordinary person," he added."

"We're still here," he said, "despite being only 18 and 17 at the time."

In 1966, while working at a summer camp in Long Beach, New York, after his freshman year at Marshall University in West Virginia, Crystal and Janice first met.

Crystal revealed on the "WTF with Marc Maron" podcast that she said she would marry the girl who walked by and four years later, she did.

Since Janice resides on Long Island, the six-time Emmy Award winner decided to transfer to Nassau Community College as a sophomore.

"I fell deeply for her from the moment I met her," Crystal confessed. "I must admit, I'm not sure if you've ever experienced a long-distance relationship - they tend to be challenging."

In June 1970, the pair got married and later welcomed Jennifer and Lindsay into their family.

In a recent interview with People, Crystal discussed how his life transformed following his experience of parenthood.

Becoming a dad changed my life completely," he said. "When I first became a dad in 1973, Janice was working and I was starting my career as a stand-up at night. So, during the day, I was ‘Mr. Mom’ and that changed my life totally.

Crystal shared, "Being a 25-year-old with an infant who relies on you to get through the day has been a significant responsibility. However, discovering that you can love something more deeply than yourself has been the most profound experience in my life as a person."

"He stated that his entire life's effort has been to produce two remarkable daughters, now grown women and mothers themselves, who would pass on the values of responsibility to their own four grandchildren, as the world continues to change."

Following his start as a stand-up comedian, Crystal appeared in the TV sitcom "Soap" for four seasons from 1977 to 1981. He also made his film debut in Joan Rivers' 1978 comedy "Rabbit Test."

Following his role in Rob Reiner's 1984 documentary "This is Spinal Tap," Crystal was cast as a supporting character in the 1987 fantasy romantic comedy "The Princess Bride."

In 1986 and 1987, Crystal played lead roles in "Running Scared" and "Throw Momma From the Train," respectively. However, it was his role in the 1989 romantic comedy "When Harry Met Sally" that catapulted him to stardom.

Although Crystal is renowned for his comedic roles in films and TV shows, his latest series, "Before," is a departure from his usual projects.

Billy Crystal's 54-year marriage to his "extraordinary" wife was driven by a shared goal.

The show revolves around Eli (Crystal), a child psychiatrist who, after losing his wife Lynn (Judith Light), meets a troubled young boy, Noah (Jupe), who appears to have a mysterious link to Eli's past.

"As Eli tries to assist Noah, their enigmatic connection intensifies, evoking chilling recollections and unveiling disquieting truths about the past."

In an interview with Planet Chronicle Digital, Crystal discussed the difficulties he encountered while performing his duties.

The character is a challenge for the actor, who has never played a character with so much stress, fear, grief, and terror. He must solve the mystery presented by Jacobi's character while also dealing with his own fears and pursuits.

"Doing that is thrilling."

In his interview with Planet Chronicle Digital, Crystal mentioned the one role he regretted turning down, which was voicing the astronaut action figure Buzz Lightyear in the 1995 Pixar animated movie "Toy Story," directed by John Lasseter, which went on to become a mega-hit and a franchise.

Crystal explained that passing on the role wasn't a creative decision, but rather a business one that didn't feel right at the time it was presented.

"I was unaware that Pixar's first animated film was of a specific kind. I had seen the short and enjoyed it. I met with John, but it didn't work out. I sighed, 'Oh, damn.'"

Lasseter later approached Crystal about starring in another animated Pixar feature, and Crystal remembered being fully on board.

Billy Crystal discusses the difficulties of portraying a fearful character in the new psychological thriller series "Before."

Crystal remembered how two years had passed since the last time she heard from the person, and when they called her up, she eagerly listened to what they had to say.

"He said, 'No, really, I want to talk to you. I have something I want to give you, and I want you to see what we're thinking about,'" he continued. "I said, 'Well, let's, you know, when do you want to meet? And he goes, 'I'm in the lobby of your building. I'll be right up.' And then it was Mike Wazowski. So it had a happy ending."

In the 2001 animated movie "Monsters, Inc," the role of the goofy monster Mike Wazowski was voiced by Crystal, resulting in a worldwide box office revenue of $577 million and the establishment of a franchise.

The actor reprised his role in the short films "Mike's New Car" and "Party Central," as well as the 2013 feature sequel "Monsters University."

Jupe, Crystal's "Before" co-star, is a child actor who recently starred opposite Jude Law in the Disney+ live-action movie "Peter Pan and Wendy." He has also had roles in the Epix series "Brittania" and the PBS miniseries "Tom Jones."

During an interview with Planet Chronicle Digital, Jupe discussed the insights he gained from collaborating with Crystal.

"Jupe said that Billy had taught him many things during their time working together, and he believed that one of those things was always striving to have fun, even during stressful scenes."

Jupe, 11, stated that it was "good" to create a fun atmosphere on set to prevent the cast and crew from being "always so kind of down."

Billy Crystal regretted turning down the Buzz Lightyear role in the original 'Toy Story'.

Jupe contemplated the message he desires viewers to grasp after watching "Before."

""Sometimes you've got to try to keep on trying. Just go for it. You've got something. Just keep doing it. Keep going for it. Because anything's possible," he said."

"Before" will premiere on Apple TV+ Oct. 25.