(Got both your asks, Anon, just answering once)
In
movie!Interview With Vampire, Lestat says that line at 14 min, 22 seconds into the movie, on the NTSC (US) version. I don’t know when that would be for PAL. Anyone out there with a PAL copy can reblog/comment what it would be for that version.
So basically, start the movie at 11:45 pm New Year’s Eve your time, to begin 2018 w/ Louis’ freshly minted vampire eyes *u*

^Louis is, in fact, capable of smiling, here’s a rare sliver of a smile ❤