Monarch + Echeveria

I just returned from a trip to Portland, Oregon to visit my sister. The first thing I noticed when I got out of my car and was inspecting my succulent collection was this big fat monarch caterpillar forming its chrysalis on my Echeveria gigantea.

Monarch caterpillar forming its chrysalis on Echeveria gigantea.

Looks like it took its time finding the perfect spot. I do believe those are tiny monarch footprints on the leaf to the left.