Megastar Amitabh Bachchan, who caught up with actors Ranbir Kapoor and Katrina Kaif on the sets of reality show "Katrina is a modern day marvel. From a non-Hindi speaking young shy and uncertain lady of "They (Ranbir and Katrina) were charming and involved and sweet. Ranbir as you all know is related to me. His cousin - Rishi Kapoor's elder sister's son is married to Shweta, my daughter.