Alex is an African lion and was the self-proclaimed king of the zoo.
Alex loves the zoo and was surprised when hearing Marty's wish to leave and live in the wild. As the main attraction of the zoo, he is featured heavily on merchandise and gives an "Alex the Lion" snow globe and other merchandise to Marty for his birthday. He also shows an infatuation with steak, though later remarks that sushi tastes better.
As a cub, Alex was born on a African wildlife reserve and named Alakay. He was the son of the alpha lion, Zuba, and was constantly given lessons on hunting, though he displayed no interest in the activity. Instead, he would dance around rather than pounce on the toy his father used to train him. During one of the sessions, Alex was captured by poachers. In an attempt save his son, Zuba pursues the truck. He rips off the safety harness and is shot in the ear, falling off the truck. As the truck turns the crate he was contained in fell into a river (Due to no harness) and eventually floated to New York. Alex arrives in New York after floating over the Atlantic Ocean when his transport crate fell into the sea. He is brought to the Central Park Zoo and proves to be very popular with the public. Also he is afraid of the ocean or water based on the first film Madagascar.