Don Johnson (left) and Bruce Willis laughing together as they leave Nicky Blair’s restaurant in Los Angeles, June 2, 1987. Getty Images ...

Don Johnson has been friends with Bruce Willis for decades and reminisced about the early days of their friendship amid the star’s dementia diagnosis.

Bruce Willis was once one of Hollywood's most in-demand actors, but his health issues saw his career - and his life as a whole - come to a grinding halt.

Of all the great movies in Bruce Willis' career, this Rian Johnson epic features one of Willis' best characters.