You don't need to "go to the mattresses" to believe that every Meg Ryan and Tom Hanks film is perfect. It's just one of those truths in Hollywood. Everybody knows it.

Their four films, Joe Versus The Volcano, Sleepless in Seattle, You've Got Mail, and Ithaca have taught us that it is possible to fall in love with a stranger that lives on the other side of the country or in online chat rooms. It's even possible to fall in love with the person taking you to a volcano.

The reason Hanks and Ryan have worked together so many times is because they undeniable chemistry and have a decades-long friendship. Think of great Hollywood collaborators who are best friends like Johnny Depp and Tim Burton or Robert DeNiro and Al Pacino.

When there is true chemistry and friendship the best films happen, and this is true for Ryan and Hanks. Here's a look at their relationship.

What It Was Like Working With Each Other

Before Adam Sandler and Drew Barrymore were one of Hollywood's best on-screen couples, Hanks and Ryan dominated.

This is Hanks and Ryan we're talking about here. They have both been standup actors throughout their careers, so it's no surprise that they had the intensity needed to be romantic with each other in four different films.

Related: Here’s How Tom Hanks Fulfilled His Childhood Dream To Be An Astronaut In Hollywood

When Sleepless in Seattle turned 25, Ryan told the film's producer Gary Foster that Hanks was so "easy" to work with. "He's just so easy," Ryan explained to Foster. "He listens; he roots for other people."

"(Hanks) doesn't like there to be drama," Ryan continued. "I feel the same way. We're just really there to have fun, this is supposed to be a creative experience and there's no reason to get heavy."

Even though there was only about a five-year gap between Sleepless in Seattle and You've Got Mail, Hanks said, during press for the later film, that it felt like they'd never stopped working together.

"In the course of the history of the movies, there’s an awful lot of creative teams that periodically got together. Sometimes they’re men, sometimes they’re women," Hanks said in a 1998 interview. "With Meg, this is the 3rd movie I’ve made with her and we pick up where we left off."

Hanks has called Ryan "very smart" and that he always has to be on his toes around her. What is a partner in crime if they don't test you?

After Their First Three Films

When Hanks was being honored with the AFI Life Achievement Award from the American Film Institute in 2002, Ryan was of course there to give a speech about him.

In her speech, she hilariously claimed that Hanks was a dominatrix and that they'd met way before they'd been in films together.

Related: Meg Ryan Sold Her Island Mansion …For A Whopping $9 Million!

"I think that Tom informs all the other Toms: Tom the movie lover; Tom the movie-doer; the movie lover; Tom the baseball cap-wearing nibbler of little corn-on-the-cob thingies; Tom the man who appreciates these awards, but certainly doesn’t need them because his life is enough. The guy who finds what is noble and what is fine and what is simple and finds the extraordinary in what is ordinary."

Seventeen years after working on You've Got Mail together, Ryan approached her dear friend once again to star in a film she was directing called Ithaca. While Hanks had a small role in the film, Ryan was no less thankful for his help.

Related: Here’s How Tom Hanks Became the Iconic Woody in Toy Story

He’s just so dear. He so did not have to do that," Ryan told Entertainment Weekly about how Hanks came to help. "It took him a day to [shoot his scene]. At the end of his time, he says to the crew, 'All right, gather ‘round. Listen, I know we’ve gotten to know each other very well over the last 10 hours together, but I just want to thank you for being here for my friend Meg.' It was such an act of friendship. I love him so much."

Of course, with all their history, whenever Hanks and Ryan reunite it's a big thing. When Hanks appeared on Good Morning America in 2016, Ryan was also there and you can guess how excited Hanks was to see her.

There's no telling if we'll get another film (hopefully a romantic one) from Hanks and Ryan in the future, but they've given us all we need in feelgood, tear-jerking films to comfort us in our time of need. Maybe we don't just want to be in love, we "want to be in love in a movie."

Next: How Close Was Tom Hanks To Playing Batman?