Shah Rukh Khan already has many roles under his belt, but this one might just surpass them all, playing as Aryan a super star like his own real life persona, and his own biggest fans Chandna. It's one of the performances that resonates in personal level, there are times that audience would believe he's two different persons.
Chandna is a fan highly obsessed with his star Aryan, almost down to a fault. This may seem like harmless attachment, but after a certain incident, the fondness becomes volatile and it turns him against his own idol. The playful theme can be deceptively bizarre, but with more social media outreach, fan might just think they are actually connected to random stranger. It's shown here at its most extreme, though might be slightly exaggerated.
Both setting and make-up enable SRK to deliver crisp and flashy scenes. The sight of London and Dubrovnik make for great scenery even when he simply traverses them, but the zenith is the performance as two characters side by side. The make-up does a good job on creating highly different visages, the rest is sheer acting prowess. Some of the action scenes are admittedly awkward, it's mostly a thriller but there are a few overly long chase sequences perhaps added just for the sake of more action.
"Fan" is a tribute to one of the greatest actors in Bollywood. The acting is immensely appreciated whether one is a fan of Bollywood or not.