Salman had earlier indicated that he will not be able to devote time to celebrate as he would be concentrating on his physique for his role in the upcoming sports drama film "Sultan".
Actress Sonakshi Sinha, who had made her Bollywood debut with Salman in "Dabangg" and believed to be close to the Khan clan, revealed that his family has planned "something special" to mark the occasion.
"His family has made, done something special for him. I cannot say much as it's a surprise. I am glad I got to be part of that surprise," Sonakshi told PTI today.
Professionally, the year has been a major success for the star as both his on-screen outings "Bajrangi Bhaijaan" and "Prem Ratan Dhan Payo" were massive hits.
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While being exonerated by Bombay High Court in the 2002 hit-and-run case has been a relief for the actor. 2015 also brought controversy for Salman.
The actor apologised after his comments evoked protests.