What's the connecting link between Raabta and Behen Hogi Teri?

This Friday, two Bollywood films are releasing. Both the films have the same actor. Rajkummar Rao. 

Didn't get it? So here's the lowdown. Rajkummar's film Behen Hogi Teri where he plays the lead role is releasing on June 9. It also stars Shruti Haasan opposite him. 

On the other hand, Sushant Singh Rajput's film Raabta is also releasing along with this film. Both the films are clashing at the box office. But what people haven't noticed is that Raabta too stars Rao. Albeit in a guest appearance.

The film which has a period setting, as a flashback, has Rajkummar Rao in a special role. He plays a 324 year old person who becomes the only connecting link between the two time zones.