The Vow tells the story of newlyweds who get into a car accident, resulting in the wife experiencing complete memory loss of her husband, and the movie was sadly inspired by a real couple. The 2012 romance drama film, directed by Michael Sucsy and written by Abby Kohn, Marc Silverstein, and Jason Katims, stars Channing Tatum and Rachel McAdams as the aforementioned couple — Leo and Paige Collins. The writers changed the names of the real people whose story the movie was based on, but they still pulled many elements from their lives to craft the script.
https://screenrant.com/the-vow-true-story-real-couple-what-happened/