Actor Imran Khan is wonder-struck at the way his "Once Upon A Time in Mumbaai Again" (OUATIMA) co-star Akshay Kumar remains cool and chilled out on the movie sets.

"No, he is actually an amazingly chilled out guy, " said Imran, when asked if Akshay is a bully on the sets.

"He is so massively successful, but you won't get a sense of it when you are talking to him. Because he talks to everybody in the same way, he will happily sit on the floor, so you'll feel he is just a cool guy and he is not one of the biggest stars of the country, " he added.

Sonakshi Sinha, who also stars in the movie, says it was a "wonderful" experience working with Imran and Akshay.

"Working with two very very talented actors, one that I have worked with before and one (Imran) for the first time, it has been a wonderful experience, " said Sonakshi, who teamed up with Akshay in "Rowdy Rathore" and "Joker".

The actors were in the city to promote their forthcoming release OUATIMA.

Directed by Milan Luthria, "OUATIMA" also stars Sonali Bendre. Produced by Ekta Kapoor and Shobha Kapoor, the film is slated for an Aug 8 release.