Actor Boman Irani is joyous about becoming grandfather after his son Danesh and daughter-in-law Reah welcomed their first child.. The 56-year-old took to his Twitter account to announce the arrival of his grandchild.. "My daughter-in-law is a mom today. My son is a now dad. My wife is a grandma and I am a Grand-dad,” Boman tweeted.. Celebrities like Vishal Dadlani, Sajid Khan, Ritiesh Deshmukh wished Boman, who according to them, will be the "coolest grandad".