[red75prime]

Disclaimer: it's my take on free will and it's probably not backed up by prominent philosophers (I haven't checked).

While your body exists in the physical world, you as an intelligent agent exist in probabilistic distribution of possible worlds. You don't have enough information to know the physical world your body belongs to. You thusly exist in all of possible worlds that don't contradict your observations.

Your act of making a free choice selects a subset of possible physical worlds where physical laws make your body go through motions of making the choice.

The physical world is still deterministic, but you don't know which one is THE physical world.