Jameson "J" Huntington III is a pre-made playable Sim who appears in The Sims 4 base game, residing in Oasis Springs with his roommates: Zoe Patel, Mitchell Kalani, and Gavin Richards. He is acquaintances with them all at the start of the game, and knows no-one outside of his household.
J is a young adult, with 24 days left before his adult birthday. He has the Bodybuilder aspiration and works in the Tech Guru career as Quality Assurance. He has two skill points each in fitness and programming.
J and his roommates appear to be based on the lead characters from the sitcom New Girl, a US television series about an eccentric young woman named Jess and her three male roommates. Though Mitchell, J, and Gavin do not seem to be directly based on any one of Jess's roommates in particular, J bears the strongest resemblance to Schmidt due to their shared ladies' man tendencies and interest in fitness (though the latter is a trait J also shares with Winston).
- Unlike with Frances J. Worthington III and Malcolm Landgraab IV from previous games, where the number part of the last name is inherited by both the spouse and children, The Sims 4 does not change the last names of married couples (this has to be done by using a cheat instead), and when a baby is born or adopted, the player is given the chance to choose both their names, allowing the player to remove the number part.
- J is one of very few characters - possibly even the only character - in the franchise to have only a single letter as one of his names.
- According to the official site news blog, J stands for Jameson.
- J shares a last name with the character Warner Huntington III from the movie Legally Blonde