Jonny Lee Miller was cast as the heart-throb in the original Trainspotting movie.
Even more than his co-star Ewan McGregor, Lee Miller, as the peroxide-haired Sick Boy, was seen as the male 'eye candy' who would help sell the film to female cinema-goers.
Since that first movie way back in 1996, Lee Miller and McGregor's careers have gone in very different directions ahead of the new T2 Trainspotting movie which comes out this weekend.
McGregor is one of Hollywood's biggest stars with a string of hit films to his name including Moulin Rouge and Star Wars: The Force Awakens.
Lee Miller, meanwhile, has struggled with no significant further movie hits to his name and some fairly undistinguished TV credits.
There is one striking difference in his appearance since the first Trainspotting film: he has experienced significant male pattern baldness.
Like around 30% of men with thinning hair, Lee Miller, 44, has chosen to hide his baldness by shaving his head.
Nevertheless, it is obvious from the recent pictures of him at the premiere to T2 that his hair is heavily receding at the temples and he has thinning hair on the top of his scalp and crown.
Unlike many stars such as Crown Clinic patients, Calum Best, TV doctor Christian Jessen, I'm A Celebrity star Martin Roberts and Chris Steed of Gogglebox fame, Jonny has chosen not to find a cure for his baldness with a hair transplant.
If he had chosen a follicular unit extraction (FUE) procedure at Crown Clinic with our surgeon Asim Shahmalak, he could have seriously addressed his issues with hair loss and maintained a full head of hair.
We will never know if Lee Miller would have been more successful in his career if he had taken such action.
Calum Best says that he looks five years younger as a result of his procedures with Dr Shahmalak. He freely admits that taking decisive action over his hair has helped his career.
Martin Roberts, Chris Jessen and Chris Steed all came to us because they wanted to look better on TV, and they all had successful procedures with Dr Shahmalak.
Interestingly, Lee Miller's co-star Ewan McGregor still has a full head of hair.
With the exception of an action hero like Jason Statham, you rarely seeing leading Hollywood heart-throbs with significant male pattern baldness.
It is not too late for Lee Miller to address his problems, and it will be interesting to see if he does take action to remedy his baldness over the next few years.