Ad-agency president Dan Edwards goes to Mexico to celebrate his nineteenth wedding anniversary and winds up getting divorced by mistake, whereupon his wife Valerie marries his best friend Ernie Brewer by mistake.
Marriage on the Rocks is a 1965 comedy film starring Frank Sinatra, Deborah Kerr, and Dean Martin about a businessman's wife who ends up divorced by mistake and then married to his best friend by an even bigger mistake. The film was written by Cy Howard and directed by Jack Donohue.