Isabella Rossellini and David Lynch were one of Hollywood's most iconic couples. They met on the set of Lynch's film, "Blue Velvet," and their relationship quickly blossomed into a professional and personal partnership. However, after seven years together, the couple abruptly ended their relationship. There are several theories as to why Isabella Rossellini and David Lynch broke up. Some believe that Lynch may have been cheating on Rossellini with another woman. Others believe that the couple simply grew apart over time. Whatever the reason for their breakup, it is clear that Isabella Rossellini and David Lynch had a deep connection during their time together.