In The Lion King, Simba was born to Mufasa andSarabi, and, at his birth, was presented to the kingdom as their future king. Rafiki, a wise mandrill who was an old friend of Mufasa, headed the ceremony, performing a ritual before presenting Simba.
Simba grows up into a playful cub, with a rambunctious attitude. He grows excited about being king someday after Mufasa shows him the kingdom. Mufasa explains that Simba will one day rule over everything they can see, but warns Simba not to go to a shadowy area beyond the borders of the Pride Lands. Though Simba, initially believes that being king is about getting to do whatever he wishes, Mufasa teaches him about the responsibilities or royalty. Suddenly, Mufasa is called to handle an emergency, and Simba is sent home, much to his disappointment.
After Simba returns home, he tells Scar, his uncle, about the trip. Taking advantage of the cub's naive nature, Scar tells Simba what the forbidden place is in fact the elephant's graveyard, where only the bravest lions travel. Simba wants to prove himself brave, and Scar makes this their "little secret." As of that moment, Simba's journey to kingship had begun.
Later that afternoon, Simba meets his best friend Nala and they travel to the graveyard. Unknown to them Scar had placed his hyena henchmen there to kill the cubs, in an attempt to remove Simba from the line of succession so that Scar could become king. Having been found by Zazu, Mufasa saves the two cubs, foiling Scar's plan. Mufasa takes Simba home, lecturing him on the danger he put himself and Nala in and he forgives and forgets. Afterwards, Simba asks if they will always be together. Mufasa responds by telling Simba about the Great Kings of the Past, who look down from the stars. Mufasa tells Simba if he ever feels alone, the Great Kings will always be there to guide him, and so will he.
The next day, Scar tells Simba that his father has a surprise for him. Scar leaves him in a deep gorge, telling Simba that Scar will return with his father soon. In fact the "surprise" was another plot of Scar's, with the goal of killing both Simba and Mufasa. Scar's hyenas drive a herd of wildebeest toward Simba. Though Mufasa was able to save Simba, Mufasa did not survive. Mufasa had attempted to climb a sheer cliff to safety after dropping Simba on a safe ledge. Near the top, Mufasa called to Scar for help. Instead, Scar threw him off after saying with an evil grin, "Long live the king". However, this was unknown to Simba, who only saw his father fall to his death. Simba is later manipulated by Scar into believing that Mufasa's death was his own fault. Scar tells Simba to leave the kingdom, and secretly sends the hyenas to kill him. Simba is able to escape by leaping into a bed of thorns. Simba then runs far away from home.
After being stranded in a desert, he meets Timon, a meerkat, and Pumbaa, a warthog. The pair had saved him from death, and offered to let Simba stay with them, as Simba was an outcast like they were. They teach Simba about their life in the jungle, and about their motto "Hakuna Matata", which means "no responsibilities, no worries." Simba takes this to heart, and survives by eating bugs. But they also teach him a very important life lesson, how to put your past behind you which would become a key role later on in the young prince's life.
Years later, Simba has grown up into fairly carefree young adult lion but he is reminded of his father's death while he, Pumbaa and Timon are stargazing. One day, Simba is called upon to saving Pumbaa from a mysterious lioness, he discovers that the lioness is his old friend Nala. Though Nala is happy, as Simba being alive means that Simba can become king, Simba is hesitant, as he still feels guilt about Mufasa. After Simba and Nala spend time alone, they discover their friendship has blossomed into love. However, Nala tries to get Simba to return with her to the Pride Lands. She tells him about Scar's tyrannical rule, but Simba still refuses. Only encounters with both Rafiki and the ghost of Mufasa are able to convince him to return, as Mufasa reminds him that he must accept his role in the Circle of Life and Rafiki demonstrates how you can either run from the past or learn from it.
Simba returns to the Pride Lands where he discovers that the land has been destroyed during Scar's reign. As a result the herds have moved on, leaving the pride with no food or water. Simba heads to Pride Rock, followed by Nala, Pumbaa, and Timon who had joined Simba. While Timon and Pumbaa distract the hyenas, Simba goes to find Scar, while Nala rallies the lionesses. Simba reveals himself to his uncle after seeing Scar strike down Sarabi. Scar is fearful at first, but is able to force Simba to admit guilt in Mufasa's death. Scar forces Simba over the edge of Pride Rock and pierces Simba's paws with his claws (just like he did to Mufasa ) before revealing that he killed Mufasa, not Simba. Simba is enraged now realizing Scar was completely a big liar and after having a flashback to the fateful day he watched his father die, he summons a surprising level of strength and breaks free of Scar's grip and jumps up, and pins Scar down and forces him to tell the truth to the pride. Alongside the lionesses and his friends, Simba leads a battle against Scar. After a fight with Scar at the top of Pride Rock, Simba is able to flip the villainous lion over the ledge. There, Scar is consumed by his hyena henchmen, who were angered after Scar attempted to place the blame on them for Mufasa's death.
By the time the land is restored to its former glory, Simba has taken his rightful place as king. He married Nala, and the two have their own cub, who is presented to the kingdom in a similar manner to the beginning of the film. He's the grandson of Ahadi and Uru. and great grandson of Mohatu.
- Even though he doesn't make an appearance in Descendants, before Mal, Jay, Evie, and Carlos exit the limousine when they arrived in Auradon Prep,in the back of the limousine next to Auradon Prep, they are two Lion statues which references Simba as a symbol to the school.
- His name means Lion in Swahili.
- He is voiced by
- Jonathan Taylor Thomas(Young)
- Matthew Broderick(Adult)
- Since The Lion King took place 1990 and The Beggining of Auradon was in 1995, it would mean that the events of Simba's Pride and The Lion Guard may have never happened.
- It would also may have prevent the existence of Kion and Kiara.