On actor Ranbir Kapoor's 34th birthday, his proud father Rishi Kapoor said he wants his son to focus on doing good work. "Happy Birthday Ranbir! God bless. Bas, apna kaam achcha karo! (Just do your work well)... We (are) proud of you," Rishi tweeted. Ranbir has shared screen space with his parents in film Besharam.