Mumbai, March 1 (IANS): From panning the camera to the life of a celebrity to splashing shades of darkness with a focus on a fan's obsession -- the trailer of Shah Rukh Khan's “Fan” didn't just turn out to be a treat for the superstar's real life fans, but also left stars of the tinsel town spellbound.

From Salman Khan, Karan Johar to Varun Dhawan, members of the film fraternity raved about the film, calling it 'FAN'tastic, and saying that they can't wait for the film to hit the screens. 

After teasing the film buffs with glimpses of the film, Shah Rukh opened a new chapter from the story of the film with the trailer launch, which was held here on Monday. Sticking to the theme of the film, Shah Rukh unveiled the trailer with hordes of his fans in attendance.

Directed by Maneesh Sharma, the film has been shot in various locations in Mumbai, Croatia and Delhi. 

The film will bring forward a story about a fan's obsession towards a star, and how the admiration turns into a negative thing when the star dispels his love for him. The catch in the film is that the fan is star's lookalike, and how he uses it for his advantage when he turns his 'biggest enemy'. 

Here's what the stars tweeted over the film, which will make its way to the theatres in April: 

Salman Khan: @beingsalmankhan being a fan of @iamsrk. 

Karan Johar: So this is the trailer of the decade! #Fan...@iamsrk is unbelievable and pure genius! @yrf #adityachopra

Huma Qureshi: Woahhhh! Speechless Spellbound @iamsrk @yrf #maneeshsharma #Fan

Varun Dhawan: Wow @iamsrk sir you have raised the bar yet again. Brilliant @yrf and #maneeshsharma your the man. #Fan

Kunal Kemmu: Uff what an awesome trailer @FanTheFilm can't wait to watch it. Maneesh Sharma @iamsrk sir hai re Jabra hoy re Jabra fan Ho Gaya!

Zoa Morani: Fan trailer...Cant wait for some more @iamsrk magic...What a mindblowing trailer @yrf #FANTrailer 

Sooraj Pancholi: #FAN a film that I can't wait to watch! #FANTrailer 

Sujoy Ghosh: This FAN trailer is kickum assum!! no one does menace like SRK.

Ayushmann Khurrana: Awe-inspiring Shah sir! Main bhi #Fan hoon!

Milap ?Zaveri: The #Fan trailer is simply FANtastic! This is the @iamsrk I grew up being the biggest fan off! #Baazigar #Darr 

Kartik Aaryan: Fab fan trailer...Already a fan but Main toh fan ka fan ho gaya @iamsrk @yrf #maneeshsharma 

Esha Gupta: This is epic #Fan #FANTrailer

Sushant Singh Rajput: As a fan of @iamsrk I have never been a bigger #FAN. What a fabulous trailer.. Check it out..

Nikkhil Advani: Now here's the @iamsrk that we grew up worshipping. DARR revisited. #Fan @yrf 

Ali Zafar: Winner! @iamsrk too good. 

Vishal Dadlani: Pretty bloody kickass, this! @iamsrk or #Gaurav? Which of them are you rooting for? #FanTrailer 

Mika Singh: Had a great time at the #MirchiMusicAwards. It was lovely to see big bro @iamsrk. Your #FANTrailer was superb

Rahul Dholakia: Have you been mesmerized by the #FANTrailer yet?

Emraan Hashmi: Loved the #FanTrailer!! Great work @iamsrk!! Waiting for the movie now.