I Married a Witch inspired the Bewitched TV show. Bell, Book and Candle is also very similar. 

Plot inspired by a plot twist in Something Wild.

Similar elements include green card marriage, the publishing industry, and a grandmother who helps get the couple together. 

Love Affair was remade the same director, Leo McCarey as An Affair to , which is directly referenced throughout Sleepless in Seattle. 

Lord Farquaad is inspired by Prince Humperdinck.

Other comedies of remarriage include The Philadelphia Story, My Favorite Wife, The Palm Beach Story, Love Crazy, and their countless remakes. 

A gender bent adaptation of The Front Page. Switching Channels is a direct remake. 

A witty newsroom battle of the sexes.

Teen Beach Movie satirized the teen beach comedy genre invented by Gidget.

Book loosely based off of Pride & Prejudice

Based off of The Taming of the Shrew.

Both films are fairytale deconstructions inspired by Tristan & Isolde, which also inspired Vertigo and Mulan/Aurora’s romance in Once Upon a Time. 

Both are based off of the play The Parfumerie, which also inspired the MGM musical In the Good Old Summertime and the Broadway musical She Loves Me. 

Both romantic comedies feature chaotic couples falling in love again after cases of amnesia. 

Intolerable Cruelty is inspired by the comedy of remarriage subgenre that The Awful Truth is the pinnacle of. 

Down With Love is an affectionate parody of 50s/60s sex comedies, specifically Pillow Talk and Lover Come Back (both starring Doris/Rock/Tony) and Sex and the Single Girl. Tony Randall cameos in his final role. 

Invented the timeloop trope as we know it. 

Gene Kelly’s character, like Errol Flynn’s Robin Hood, is the blueprint followed by the leading men in The Princess Bride, The Pirates of the Caribbean, and Tangled. Gene Kelly’s character in DuBarry Was a Lady a similar character reminiscent of Robin Hood. 

Besides the aforementioned, similar movies include Send Me No Flowers, Move Over Darling, That Touch of Mink, and Man’s Favorite Sport.

Cactus Flower was remade as the inferior Just Go With It.

Inspired countless remakes and the blueprint for romantic comedies such as, Roman Holiday, It’s a Wonderful World, The Philadelphia Story, and Leap Year. 

Based off of The Taming of the Shrew. Other notable adaptations of The Taming of the Shrew include Woman of the Year and Moonlighting’s Atomic Shakespeare.