Offerman married actress Megan Mullally on September 20, 2003. They met while acting in "The Berlin Circle", a play produced by the Evidence Room Theatre Company, and married after dating for 18 months. While they were still dating, Offerman appeared in a guest role on Mullally's sitcom, "Will & Grace", in a 2001 Thanksgiving episode. He later guest starred in a different role in a 2018 episode. Mullally also had a recurring role on her husband's sitcom, "Parks and Recreation" as Ron Swanson's second former wife, Tammy 2. The couple have also appeared together in films such as "The Kings of Summer" and "Smashed", as well as performing voice work together in "Hotel Transylvania 2", "Bob's Burgers", and "The Great North".