Katrina is the most hard working actress I have ever met: Tabu

Tabu, who is sharing screen space with Katrina Kaif for the first time in their upcoming film "Fitoor", says the "Phantom" star is the most hardworking actress she has ever worked with."Katrina is the most hard working actress I have ever met, seen and worked with. I had three days to prepare... the involvement with which she works is amazing," Tabu told reporters here at the trailer launch of "Fitoor" last evening.Director Abhishek Kapoor too thinks Katrina is completely into her work."I think Katrina has Fitoor (a kind of madness for something) of work.... the way she works is amazing. She is very dedicated towards her work," Abhishek said.Katrina says she enjoyed shooting with Tabu, who plays her mother in "Fitoor".