“I’m exhausted,” Greenfield, 35, told PEOPLE at the premiere of American Horror Story: Hotel in Los Angeles on Saturday night. “I’m sorry, I don’t know where I am.”
In 2010, Greenfield and Sanchez welcomed daughter Lily. Now, he’s back at diaper duty with his 6-week-old son, something he still is having trouble believing himself.
“We have kids now — plural! Now it’s like, ‘I got to go pick up the kids. I got to get the kids home.’ That ‘s,’ the pluralized kid, is a big deal,” jokes Greenfield, who plays a drug addict on the new season of the FX hit, premiering Wednesday night.