(Cover) - EN Showbiz - Leonardo DiCaprio has been told to pucker up for his role in J. Edgar by his co-star.

Leonardo has appeared in some of Hollywoods biggest films of recent years including Titanic, The Aviator and last years smash Inception.

In his upcoming film he will play former FBI director J. Edgar Hoover, and it will see him having to kiss Armie Hammer as he portrays Hoovers assistant Clyde Tolson. It is set to be released in 2012.

And Armie has urged Leonardo to let go of his inhibitions for the role.

He's a talented actor. I'm not nervous or afraid of it being awkward. The script is great. The scenes are in there for a reason. I'm really excited... you hear that, Leo? Pucker up!" the 24-year-old told E! Online.

Armie, who played both identical twins Tyler and Cameron Winklevoss in The Social Network, is also excited about the extent of the relationship between himself and his co-stars character.

It's not a kissing scene - it's a ton of kissing scenes, he joked. (C) Cover Media