One of New York's highest-profile gay couples celebrated last night's passage of the gay marriage bill in appropriate fashion: Neil Patrick Harris and David Burtka got engaged. "I've already (proposed), he said yes! Thank god!" tweeted Burtka, before adding, "he proposed to me as well. I said yes! Thank god!," reports the Huffington Post. No date tweeted, but the How I Met Your Mother star and actor/chef Burtka can wed in about a month after Gov. Andrew Cuomo signed the legislation late last night. They already are the parents of twins.