A source tells PEOPLE that Kylie Jenner "wants to be by" her boyfriend Timothée Chalamet's "side for it all" as awards season begins and he continues celebrating the release of 'A Complete Unknown.' "Kylie is happiest,

There are a few celebrity couples that are so stylish, their relationships are still revered to this day (even though some of them have been broken up for decades). Angelina Jolie and Billy Bob Thorton, Pamela Anderson and Tommy Lee, Hailey and Justin Bieber —the list goes on.

The makeup mogul “has never felt like this about anybody else before and definitely sees a future with him,” the insider says.