You may have seen Jimmy Fallon's various impressions of Neil Young knocking around YouTube in the past; the US TV show host does a pretty spot-on rendition of the rock god and has wheeled it out in the past on numerous occasions over the last couple of years.

However, Monday night's show saw Fallon's Neil Young joined by the actual Neil Young to perform his classic song 'Old Man'. The results are both hilarious and actually pretty good. Who is the real Neil? SO CONFUSING.

Watch it below: