The new rumoured couple were seen holding hands at the party.
The pair are matching, wearing all black.
Julia shows off her mid-riff in a cropped, long sleeve latex top, as well as low waist leather trousers and matching black gloves, boots and bag.
Ye wears a baggy black hoodie, with matching trousers and shoes.
Fox recently spoke in an interview about what it is like dating Kanye. You can read more about this here.