Mumbai, Feb 23 (IANS) Irrfan Khan, who's currently shooting for English director Danny Boyle's much-talked-about "Slumdog Millionaire" in Mumbai, says he enjoyed working with Arshad Warsi in "Sunday".This was his second film with Arshad and both shared great chemistry on screen.

" 'Sunday' was fun though I can't say the same about the first film that we did together. I didn't enjoy doing 'Chocolate'. Till the end we weren't told what the story was and the plot kept getting changed all the time," Irrfan told IANS.

"On the other hand, during 'Sunday', director Rohit Shetty was very rigid about going by the plot. But Arshad and I were constantly given a chance to improvise. We had loads of fun because I like working with competent actors. And Arshad is outstanding. In fact, Arshad and I have a third film 'Krazzy 4' lined up."

Irrfan is looking forward to more films with Arshad.

Talking about his third international project, he said: "In Danny Boyle's 'Slumdog Millionaire' I'm the narrator, catalyst and obstacle to the protagonist's progression. I play a cop. But I've no name. I'll be billed 'The Cop' in the film which releases at the end of the year."

Irrfan says he was keen to work with Boyle.

"I've been a fan of his films for a long time. I've seen them all. When I got to know he was making a film with Indian actors, it was important for me to just be part of the project. I had about 14-15 days' work in 'Slumdog Millionaire' and I've enjoyed every bit of it."

This would be Irrfan's third major international venture in a year after Mira Nair's "The Namesake" and Michael Winterbottom's "A Mighty Heart".

"I don't look at 'Slumdog Millionaire' as another opportunity to make a mark abroad. For me every challenge as an actor is equally satisfying.

"What I look forward to is the chance to work with good actors, whether it's Arshad Warsi in 'Sunday' and 'Krazzy 4' or young Dev Patel who plays the hero in 'Slumdog Millionaire'. He's a very charming Indian from Britain. Sharing screen space with new actors, whether it's Angelina Jolie or Dev Patel, is always a pleasure."