Will Smith and Jada Pinkett Smith, Ali  

• The onscreen love story: Legendary boxer Muhammad Ali married first wife Sonji Roi in 1964, but it didn't last forever; they divorced after two years. 

• The offscreen love story: The Smiths first met on another set — that of Will's '90s TV show, The Fresh Prince of Bel Air. By the time they filmed Ali, they'd been married several years, and they're still together now, with a total of 13 years of marriage under their belt.

Tim Robbins and Susan Sarandon, Bull Durham

• The onscreen love story: Annie, a bona fide baseball groupie chooses one player each year to be her lover and student. Though she's ultimately destined to be with catcher "Crash" (Kevin Costner), she dates and "educates" his young protege, a pitcher named Ebby, AKA "Nuke".
• The offscreen love story: Sarandon and Robbins met on the set of Bull Durham in 1986 and had a long-term relationship that lasted until 2009.

Reese Witherspoon and Ryan Phillippe, Cruel Intentions

• The onscreen love story: Dastardly Sebastian is only courting the virginal Annette for sport, until he starts to fall for her for real. When Annette finds that he's just using her to win a bet, she ditches him. Not wanting to lose her, Sebastian puts his evil side on the back burner and proves his love.
• The offscreen love story: Phillippe and Witherspoon had already met when they started filming this movie, and they got married just after its 1999 release. But after two kids and seven years of marriage, they split. 

 David and Courteney Cox, Scream

• The onscreen love story: Deputy Dewey and reporter Gale Weathers circle the ghost-face killer terrorizing their town and fall for each other over the course of the film and its sequels.
• The offscreen love story: Cox and Arquette famously met making the first Scream and married in 1999. Sadly, they separated in October 2010 after 11 years of marriage.

 Dominic Cooper and Amanda Seyfried, Mamma Mia!

• The onscreen love story: Sophie and Sky are madly in love, but Sophie uses their wedding plans to try to find out the identity of her father. Ultimately, the lovebirds decide to call off the wedding but stay together and travel the world.
• The offscreen love story: Cooper and Seyfried began an on-off relationship after making this movie, but lately they've been off.

 Nicole Kidman and Tom Cruise, Far and Away

• The onscreen love story: Though Shannon had been a wealthy aristocrat and Joseph a poor farm boy in Ireland, they find themselves equally hard up after they emigrated to America. Against the setting of the Industrial Revolution-era New York, they fall hard for each other and live happily ever after on their newly-claimed land.
• The offscreen love story: Cruise and Kidman had met on the set of an earlier movie (Days of Thunder) and were married for a couple of years already when they made this movie. But by 2001, they were done — and free to move on to their current respective spouses, Katie Holmes and Keith Urban.

• The onscreen love story: After being left by his wife, good cop Charlie develops a coarse split personality, Hank. Charlie/Hank accompany Irene, a woman on the run from a pair of hit men. Irene falls for Charlie despite Hank's presence — but by the end of the movie, Charlie manages to eliminate his alter ego and ride off into the sunset with his girl.
• The offscreen love story: Carrey and Zellweger began a romance after meeting while making this movie, and became engaged, but they broke it after a year and a half of dating.

 Gwyneth Paltrow and Brad Pitt, Seven

• The onscreen love story: Detective David Mills is happily married to the lovely Tracy, until she becomes the target of the sick serial killer he's pursuing.
• The offscreen love story: After falling for each other while filming the movie, Paltrow and Pitt became engaged, but they were as doomed as their Seven characters: they called it off after six months.

• The onscreen love story: Mike and Terry meet on a plane by chance and the sparks are immediate — but they're each engaged to other people. After a brief and torrid affair, they plan to meet again months later, but only one of them shows up.
• The offscreen love story: Bening and Beatty had actually met a few years earlier while making Bugsy, and were married in 1992, two years before this film's release.

 Ben Stiller and Christine Taylor, Zoolander

• The onscreen love story: Dim-witted male model Derek crosses paths with Matilda when she interviews him for a story in Time magazine. It's certainly not love at first sight, but they fall for each other in the midst of an orgy with another model and some Finnish dwarfs.
• The offscreen love story: Stiller and Taylor met on the set of a pilot in 1999 that never got picked up, but their love story is still going strong. They got married in 2000 and now have two kids.

 Miley Cyrus and Liam Hemsworth, The Last Song

• The onscreen love story: Handsome Will melts the heart of rebellious Ronnie over their shared love for endangered sea turtles during one emotional Summer.
• The offscreen love story: Cyrus met her Australian boyfriend Hemsworth on the set of this Nicholas Sparks movie in 2009. Though they broke up the following year, the two rekindled their flame and are currently back on.

 Robert Pattinson and Kristen Stewart, Breaking Dawn Part 1

• The onscreen love story: Vampire Edward and human Bella fall in love despite the fact that he wants to eat her in earlier films, ultimately tying the knot in Breaking Dawn Part 1.
• The offscreen love story: Though Stewart was attached to actor Michael Angarano during the filming of the first Twilight movie, he and Stewart eventually split, and over the course of the sequels, Pattinson and Stewart began a quiet romantic relationship.