But despite his adult attitude the film star is just 14, a fact that onlookers were reminded of as he donned an Iron Man suit to take his friend Kylie Jenner out for the day on Wednesday.
While she was dressed up to look older than her 15-years in a leopard print dress, heeled boots and a full face of make-up, her friend indulged his childish side.
The pair were spotted leaving the very adult Nobu 57 restaurant in New York , with Jaden dressed in a copycat of the shiny suit that Robert Downey Jr.'s character wears in the action series.
Smith reportedly bought the outfit that day and decided to play around with it immediately, despite dining at one of the most exclusive and hippest sushi chains around.
However, as the son of Hollywood stars Will and Jada Pinkett Smith, and the daughter of Bruce and Kris Jenner, the young couple can do pretty much anything they want and it will be considered cool by their fans.
The perfect pair were first seen together when Kylie watched aspiring musician Jaden perform as one of the opening acts for Justin Bieber at his London concert in March, and they have been openly dating ever since.
After being friends long before it became romantic, Jaden already seemed smitten with his older woman as he explained how they first met.
'I was in LA, we were all hanging out. Then I went to New York and she came too, then she came here and surprised me, so that's pretty baller,' the Karate Kid star revealed in the May issue of Wonderland magazine.
'She's one of my best friends. It's pretty awesome,' he gushed.
While has he nothing but positive things to say about Kim Kardashian's younger half-sister, his father Will balked at being compared to the highly-publicized family.
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