Actor Saif Ali Khan, who unveiled the trailer of "Happy Ending" with the movie's star cast here, has promised to offer fun and entertainment via the film. The trailer of the film, directed by Raj Nidimoru and Krishna DK, was launched here Thursday evening. "It's a very funny film. Post 'Go Goa Gone', we (Raj, Krishna and I) wanted to work together, and this script came up. It's a spoof on romantic comedies. I have done romantic comedies earlier, and this is an interesting spoof on the genre," Saif told reporters at the event. The movie also stars Govinda, Ileana D'Cruz, Ranvir Shorey and Kalki Koechlin. Talking about the cast, Raj said: "We have got a great star cast for this film. Saif was apt for the role, while Govinda was the only choice for (his role in) this film." The film is slated to release Nov 21. (Source: IANS)