Hamm doesn't last forever.

All lunch meat goes bad eventually.
All lunch meat goes bad eventually.

Jon Hamm, famed Mad Men actor with a sorta goofy smile and actress/writer Jennifer Westfeldt have broken up. The couple told Us Weekly "With great sadness, we have decided to separate, after 18 years of love and shared history. We will continue to be supportive of each other in every way possible moving forward." 

As of now, we don't know exactly why a sandwich that stayed fresh for 18 years finally turned bad, but a source informed Us Weekly that "they've been fighting for a while." Nobody wants to stay in a toxic Hamm situation, so it makes sense they broke up if they weren't getting along.

Sources: Us Magazine