Kate (Emilia Clarke) harumphs around London as an elf in a year-round Christmas shop. Tom (Henry Golding) seems too good to be true when he walks into her life. As London transforms into the most wonderful time of the year, nothing should work for these two. But sometimes, you gotta let the snow fall where it may and listen to your heart. BUILD hosted “Last Christmas” director Paul Feig and actress Michelle Yeoh to tell us about the movie.