Simba is the main character in the 1994 film The Lion King and the tritagonist of it's 1998 sequel The Lion King II: Simba's Pride and it's 2004 midquel The Lion King 1½. He is Mufasa and Sarabi's son, Scar's nephew, Nala's husband, Kiara and Kion's father and Kovu's father-in-law.
The Lion King
When Simba was born, he was presented to all the other animals in the Pridelands. His uncle Scar, however, didn't come, as he was angry that now that Simba was born, he would never be king.