Neil Patrick Harris & David Burtka: Call Us Poppa & Daddy

Neil Patrick Harris and partner David Burtka's nine-month-old twins, daughter Harper and son Gideon, are growing up fast and will be talking soon. Neil jokingly told Jay Leno that having the toddlers call both him and David 'dad' may be confusing, so they've come up with their own solution.

"This is a sore subject. Because we are two gentleman with children. And so we didn't know what to call ourselves," he said. "Daddy One and Daddy Two sound kind of strange...So David's 'daddy' and I'm 'poppa', just to differentiate."

But Neil is determined to make sure the twins ask for him first. "One of the child's first syllables is 'da da.' So I'm going around (trying to teach them) 'pa pa," he laughed.