One film that immediately comes to mind is 'The Parent Trap' (1998), starring Lindsay Lohan in a dual role as identical twins who reunite after being separated at birth. While they aren't triplets, the concept of multiple siblings is central to the plot. The blonde main character, Annie, has a distinctly British charm, while her sister Hallie is more laid-back. The movie's clever use of split-screen technology made it feel like two identical girls were interacting seamlessly. I loved how the story balanced humor with heartfelt moments, especially when the sisters scheme to bring their parents back together.
Another lesser-known pick is 'Triplets of Belleville,' an animated French film with a surreal, almost dreamlike quality. Though the main characters aren't blond, the triplets in the title are quirky, jazz-singing elderly women who play a supporting role. The protagonist, Madame Souza, is a determined grandmother with a unique design—her stout figure and relentless energy drive the story forward. It's a weirdly captivating movie, blending slapstick comedy and melancholic undertones. If you enjoy offbeat animation, this one’s a hidden gem.