Reese Witherspoon affectionately reminds Nicole Kidman of her full name, Laura Jean Reese Witherspoon, after a mix-up with co-star Laura Dern. In a video for Vanity Fair, Kidman questions why Witherspoon refers to Dern by her last name. Witherspoon explains the confusion stems from both women sharing the name Laura. Kidman admits she forgot about their shared first name but expresses confusion over the nickname. Witherspoon reveals she shortened her name before entering the acting industry. The exchange showcases the close bond between the Big Little Lies co-stars as they playfully navigate the mix-up. It also highlights the personal connection Witherspoon has to her name, tying it back to her mother's maiden name. The interaction provides a glimpse into the behind-the-scenes camaraderie among the talented actresses.