Mckenzie's illustrious acting career can be traced back to a serendipitous encounter with a cinematic legend, Robert De Niro. As De Niro was busy preparing for his iconic role in Raging Bull, released in 1980, he found himself at the Westmore residence, where he was collaborating with Mckenzie's father on a makeup-related project.
During this time, Mckenzie's father and De Niro formed a strong bond, which ultimately led to the actor approaching Mckenzie with an extraordinary request. At the tender age of just three years old, Mckenzie was asked by De Niro himself to appear in the film as his on-screen daughter.
This pivotal moment marked the beginning of Mckenzie's journey in the world of acting, setting the stage for a lifelong passion that would see her go on to achieve great things in the entertainment industry.