The forthcoming project is a sequel to 2012 superhit "Ek Tha Tiger", directed by Kabir Khan and produced under Yash Raj Films.
The 'Tiger' series centers on a fictional character of an Indian spy (RAW), code named Tiger (Salman) who falls in love with a Pakistani spy (ISI), played by Katrina.
"Katrina will be going through a rigorous training programme in hand-to-hand fighting along with Kali knife fighting with specialised trainers from the UK and LA," Zafar said in a statement here.
She will shoot for some high-octane action sequences along with Salman Khan at a studio in Mumbai and other foreign locations.