Heather St. Clair (voiced by Tracy Scoggins) is a supermodel. After spotting Garfield on the beach one day, she became determined to have him. She pretended to like Jon in order to convince him to give her his cat. After arriving in the mountains, Jon ultimately finds out that Heather was only interested in him due to Garfield. After Jon tells her that he and Garfield are inseparable, she then moves on to a man and his goat.