Jon Hamm and his girlfriend, Jennifer Westfeldt, showed PDA while walking their dog in LA yesterday. The longtime couple held hands while keeping their pup close. Jon is squeezing in low-key time with his leading lady in the middle of a busy work schedule. He was recently featured in Rolling Stone's April issue, where he responded to talk of his "impressive anatomy," among other topics. The interview was one among many of Jon's promotional undertakings in the lead-up to the much-anticipated debut of the new season of his show Mad Men — catch up on where we saw the Mad Men characters last before the show returns to AMC this Sunday, April 7.