Hrithik, who has performed daredevilry for his movie, was active on Twitter Saturday and he reached out to the celebrities via the social networking platform.
To SRK, he tweeted: "The 10pack #bangbangdare @iamsrk show us a pic doing ur fav ab exercise! All want 2 know which 1 it is! U hv 3 days! Qabool?"
The 40-year-old also wrote to his "Dhoom 2" co-actor Uday Chopra, saying: "I'm taking this forward - my #bangbangdare to @udaychopra - 100 body weight pull ups (in 5 sets)!! U game ? U have 5 days! Time starts now!!"
Among the actresses, Hrithik chose the "Khoobsurat" star Sonam Kapoor.
"My #bangbangdare 2 khoobsoorat @sonamakapoor A collection of ur happiest craziest smiles on dsuper success of khoobsoorat!! Dis 1we deserve," he posted.
Hrithik also directed a tweet to model-turned-actor Dino Morea, and wrote: "To d muscleman @DinoMorea9 your #bangbangdare - 20 parallel bar dips! 1 set!! U have 3 days!! Do u accept?"
The actor's celebrity photographer friend Dabboo Ratnani was not left behind either.
"This ones going to b fun!! My #bangbangdare to my friend @dabbooratnani - 100skips one go!! U have 2 days! Accepted?"
Hrithik even dared the smokers among his Twitter followers.
"Now d ultimate #bangbangdare 2 al d smokers out der! No smoking for 3 days. dats d time it takes nicotine to exit your system! DO IT," he tweeted.
"Bang Bang", which also stars Katrina Kaif, will hit the screens Oct 2.
