Police have charged someone after an assault on Wellington's Courtenay Place that left a man in critical condition. 

Emergency services were called to the scene outside Reading Cinema about 3.20am on Sunday. 

A 21-year-old man was injured and taken to hospital where he remains in critical condition.

Police have now charged a 29-year-old man with wounding with reckless disregard.

He is due to appear in Wellington District Court today. 

Police said they wanted to hear from anyone who witnessed the assault or knows who may be involved. 

"In particular, we want to speak to two women who were sitting close by when the incident occurred, and who would have witnessed what happened."

Anyone with information that could assist inquiries can contact police online or call 105.

People should use the reference number 241006/5414. Information can also be provided anonymously via Crime Stoppers on 0800 555 111.

- NZ Herald