Din Grogu, also called The Child (nicknamed Baby Yoda) is the deuteragonist of the Disney+ original series The Mandalorian. He is of the same species as Jedi Master Yoda.
The Child was sought after by an ex-Imperial known only as "The Client" and had a large bounty on his head. The bounty hunter known only as "The Mandalorian" attempted to collect on this bounty; the only detail he was given was that the target was 50 years old. He was told that the target was wanted either dead or alive, but his payment would be substantially lower if he brought it back dead. However, the target was being held in a high-security complex and the Mandalorian was only able to recover him with the help of assassin droid IG-11. Opening the bassinet, the Mandalorian and IG-11 were surprised to find that the target was only a baby.
Confused (as the target was supposedly 50 years old), the Mandalorian was told by IG-11 that different species age differently and that the Child would live for several centuries. IG-11 then said that the orders stated to kill the target. The Mandalorian responded by destroying the droid and taking the child back to his ship.