'Bigg Boss 10' ex-contestant Karan Mehra and wife Nisha Rawal. Pic/Nisha Rawal's Instagram account

Evicted 'Bigg Boss 10' contestant Karan Mehra, who is popularly known as Naitik from 'Yeh Rishta Kya Kehlata Hai', is all set to become a father. His wife Nisha Rawal announced her pregnancy on social media by posting a picture of her baby bump.