A Killer Look

Originally posted Oct 29th 2007 12:04 PM PDT by TMZ Staff

It's Neil Patrick Harris! The most terrifying clown -- next to Carrot Top!

The 34-year-old "How I Met Your Mother" star wore this killer clown ensemble to a Halloween party in Hollywood on Saturday. It's the scariest thing he's been in since "Doogie Howser"!