What are some movies that started relationships between the actors/actresses?

I’m trying to get a list of movies where the actors and actresses started relationships because they worked together on that film.

I can only think of:

Brad Pitt and Angelina Jolie – Mr. and Mrs. Smith

Emma Stone and Andrew Garfield – The Amazing Spider-man (I think. . . right?)

If I remember clearly, Steve McQueen and Ali MacGraw had something/started something while filming The Getaway.