"Happy birthday Yami Gautam. Shine bright today and forever. May the wonder in your eyes never diminish. And in the next, let's play superheroes! Love," Hrithik tweeted.
Yami replied by saying: "This has to be the most WONDERful birthday wish! Thank you so much Hrithik. And yes, let's bring it on."
In "Kaabil", directed by Sanjay Gupta, the duo will be seen together on the big screen for the first time.
"Kaabil" is produced by the Hrithik's father Rakesh Roshan.