Shah Rukh Khan returns as the obsessed lover (Gaurav Chandana), but this time it's of superstar Aryan Khanna (SRK). The much-awaited "Fan" trailer is out and B-town biggies cannot contain their excitement about the 50-year-old actor revisiting a genre he excelled in as a newcomer.

Salman Khan, Karan Johar, Varun Dhawan, Anurag Kashyap, Vishal Dadlani, Emraan Hashmi, Rhea Chakraborty, Esha Gupta, Huma Qureshi, KRK, Nikkhil Advani and Sushant Singh Rajput are some of the actors who have heaped praise on the three-minute-long clip.

What took most by surprise was the shades of grey that the fan-boy has to him. The "Jabra Fan" song showed a sweet and innocent side to him, and as someone who is head-over-heels in love with his cine idol. But the trailer highlighted the stalker in Gaurav. Also, the gripping background score and some tastefully formatted action sequences add to its appeal.

Although the buzz is that Shah Rukh is going back to the start of his career with this one, he likes to deny it. "But it is a lot different, the genre maybe the same, of an anti-hero or bad guy, to put it in general compartments, but as a film and as a character, it's very different from 'K..K..Kiran' or 'Harkar jeetne walo ko baazigar kehte hai'," he told the IANS.

Scheduled for an April 15 release, the thriller is helmed by Maneesh Sharma and stars Waluscha De Sousa in a key role.

Check the what celebs have to say about the trailer here:

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.

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

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

Anurag Kashyap: Next year awards Best Actor,Actor in a negative role, debutant booked #srk #fan love the trailer, hv missed this SRK , not Aryan but Gaurav

Kamaal R Khan: After watching trailer, I can say #Fan is remake of #Darr n it can be terrific n biggest hit of 2016.

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

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

Arijit Singh: #FANTrailer shows the stardom of @iamsrk 's fan. Maneesh Sharma has done fabulous job. #Emotions #Love and #SRK

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

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

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

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

Esha Gupta: this is epic #Fan #FANTrailer

Ali Zafar: Winner!!!!@iamsrk too good.

Rhea Chakraborty: And it's here .. @iamsrk is here to charm you twice as much #maneeshsharma #FANTrailer #YRF

Watch the trailer of "Fan" below: