Filmmaker Omung Kumar has praised the acting skills of former Miss World Aishwarya Rai Bachchan, who turned 43 on Tuesday, and also said that she is a director's actor. "She is a good actress.but she is a director's actor. So, she can mould herself completely for the character. When we decided to cast her as Dalbir Kaur for Sarbjit, she proved that and on screen, we saw her as a character and not as a glamorous diva," Kumar told IANS. More from the world of Entertainment: After clinching the Miss World crown in 1994, Aishwarya starred in many hit films like Hum Dil De Chuke Sanam, Taal and Dhoom: 2. Kumar said that "after the release of Sarbjit (2016), people have changed their perception about her as an actress". What makes her so special? Kumar said: "Even after becoming such a huge star, she is extremely hard working and a hardcore professional. She does not just work in a film, she collaborates with the director of the film. She is very cooperative by nature, and that is why I share a very good bond with Aishwarya." "During our shooting of Sarbjit, she didn't even use mobile phone on set. That's her dedication level. I wish her a very happy birthday and wish to see her growing as an artiste," he added. Also read | Aishwarya Rai Bachchan to enjoy birthday with friends and family Meanwhile, a source has shared that the Padma Shri awardee, who has a daughter with actor Abhishek Bachchan, celebrated her birthday with family. Aishwarya's latest appearance in Karan Johar's Ae Dil Hai Mushkil is currently the talk of the town. Her glamorous avatar is one of the best takeaways from the film which also stars Ranbir Kapoor and Anushka Sharma.