Veteran actress Sharmila Tagore loves watching her son's films as any mother does and feels his acting has improved phenomenally over the years. At the same time she says Saif Ali Khan is not the easiest of actors to work with.

"As an actor, Saif has grown by leaps and bounds. I think in 'Love Aaj Kal', his monologues are really good. And over time, he has become a very sensitive actor. I am really proud of him," Sharmilau00a0said in an interview.