The 38-year-old actor dotes on Wyatt and can think of nothing better than being a father, reported E! online.
"It's legitimately the greatest thing ever."
Kutcher is also excited about his latest venture, new Netflix series "The Ranch", in which he stars alongside former "That '70s Show" co-star Danny Masterson, and the two actors can see a lot of similarities between their new characters and their former alter egos.
Kutcher, who plays failed semi-pro NFL player Colt, said, "I think the magic thing is it has that same feeling of a couple friends hanging out or a couple brothers hanging out.