Neil Patrick Harris: Babies Laughing Is Like Opium!

Neil Patrick Harris attends the opening night reception for Art Los Angeles Contemporary with partner David Burtka on Thursday (January 27) at The Barker Hangar in Santa Monica, Calif.

The 37-year-old How I Met Your Mother recently revealed one of his twins’ latest milestones!

“The tots both started laughing. On the same day. I’m now obsessed with getting them to do it. Babies laughing is like opium,” Neil tweeted about his almost 4-month-old babies Gideon and Harper.

“Finding time to exercise is difficult with babies. I’m thinking of trying P90X. Thoughts?” he said in another tweet, before adding, “Meh, maybe I’ll just spring for liposuction and 639 muscle implants.”

Bigger pic inside…