The 35-year-old actress asked Kemmu, who turned 31, to enjoy the monsoon and have pancakes in the City of Joy.
"Happy birthday Kunal Kemmu. It's a Sunday.. It's pouring in Kolkata - time for pancakes I say," Sohal posted on Twitter.
The couple have been dating for quite some time now.
Soha was last seen on the big screen in 'Mr Joe B Carvalho'. She is currently shooting for Shivaji Lotan Patil-directed '1984', which is based on the anti-Sikh riots.