Based on his expressions and VI (expressions including speech, verbal metrics, etc) I type him as Ti ESTp.
YouTube - Interview - Leonardo DiCaprio
I will attempt to describe his actions without VI (admittedly, he is not someone I've thought about in detail):
He is very intense in expression. He can be calm and even soft-spoken, but he retains an intensity and focus (personally, that is something that annoys me. Its very dry and unnerving). He seems attracted to dramatic and serious roles in film (Not only that, but he plays those roles rock solid). He's energetic, active, I think we can agree on Ep temperament. Doesn't constantly pause and ruminate on what to say (like I'd expect an Ip), discussion seems to come fluidly and easily. Can begin talking about a subject and elaborating on it with ease (perhaps not a trait of socionics, but instead of being a trained actor).
I'd say the movies he is chosen for and/or attract him are very very very very Beta or at least Ni/Se (these are movies I can enjoy somewhat, but totally lack a cohesiveness that I want. They make some points pertaining to Ni interactions that I find redundant and dry. Its like the movies take themselves too seriously, plus I fucking hate the mafia lol).
Mob movies, thrillers, epic romances, gritty dramas, etc.
So why would you say he is ENFp? What about him makes you think Delta?