Any of the movies in this trilogy could be here, but this is my favorite.

The father-daughter chemistry here is insane. I don't think this is recency bias.

That chess scene.

Grant and Audrey both have insane chemistry with everyone, so it's no surprise they work well together. I also considered Bringing Up Baby and Notorious for Grant and How to Steal a Million and My Fair Lady for Audrey, but sadly just not enough space.

Lemmon and Matthau had to be on the list somewhere--their chemistry is such a pleasure to watch in everything they are in.

Marty and Doc.

The movie is good, but I don't love it, but the chemistry is just that good.

I couldn't leave Bogey and Bacall off the list.