David Letterman has honoured his good friend and fellow comedian Robin Williams with a touching 10 minute tribute to the late actor on The Late Show.
Williams died at the age of 63 on August 11. At the time of his death The Late Show was on a break.
In his first show back from break, Letterman took 10 minutes to honour the late star - his friend of 38 years.
Letterman spoke about his friendship with Williams, revealing the actor cast him in an episode of his TV comedy Mork & Mindy.