As an AI language model, I do not have personal opinions or beliefs, but I can provide factual information on the topic. Christie Brinkley is a famous American model and actress who has been in many TV shows and movies over the years. One of her most popular roles was in the 1983 comedy film “National Lampoon’s Vacation,” where she played a character named Chevy Chase’s wife.

So how old was Christie Brinkley at that time? In 1983, when “National Lampoon’s Vacation” was released, Christie Brinkley was born on February 2nd, 1954, which would make her around 29 years old during filming. She portrayed Clark Griswold’s imaginary dream girl whom he fantasizes about while driving his car throughout the movie.

Christie Brinkley gained immense popularity following her appearance in this film due to her mesmerizing beauty and charming personality. She sported blonde hair with striking blue eyes that could turn heads anywhere she went.

Her acting skills were also well-appreciated by critics as they thought she did justice to her role while having great chemistry with co-star Chevy Chase along with other cast members including Beverly D’Angelo who played his wife Ellen Griswold.

Apart from playing Griswold’s wife, Brooke Shields had auditioned for the same role but then-director Harold Ramis decided he liked what he saw from Brinkley more and casted her instead. Her performance later garnered strong positive reactions from audiences all over who watched this classic comedy movie through re-watching it multiple times via different mediums like VHS tapes or DVDs eventually transitioning into streaming services such as Netflix today!

The success of “National Lampoon’s Vacation” opened up several doors for Christie in Hollywood as producers took notice of her talents both on camera and off-camera! From being a supermodel showcasing designer outfits to becoming an accomplished actor portraying different characters in various films over the years, Christie Brinkley has established herself as one of the most versatile performers in show business.

She remains an iconic figure to this day and her role as the Girl In The Red Ferrari will always be remembered fondly by fans who have watched “National Lampoon’s Vacation” countless times. As time flies by, we continue to remain captivated by her grace and beauty which only grows more remarkable with each passing year making it difficult for us to believe that she was only 29 years old when she filmed this classic comedy movie.