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.

Jenner has also been present at afterparties for Chalamet's other projects, like Wonka, where she showed her support without walking the red carpet. A source told People magazine that while she kept a low profile at the London premiere, Jenner and her mom, Kris Jenner, were there to cheer on Chalamet in a more intimate setting.