Here is some interesting news from the set of "Avengers: Age of Ultron." Mark Ruffalo, who plays Hulk in the movie, has shared some interesting behind the scenes photos giving the sneak peak on how he is preparing for the role.

Ruffalo shared a facial effect shot on his Instagram account, which he followed with the photo of Andy Serkis, the CGI expert. Serkis is apparently helping Ruffalo achieve the Hulk affect.

Ruffalo recently answered a fans question saying: "@Captaian_jack Well, I have been working with the great @andyserkis on the big green boy and he is going to be even better then A1."

Serkis has also been roped to cast in "Star Wars: Episode VII." He even works as a consultant in Godzilla remake and will also be seen reprising his role as Caesar in "Dawn of the Planet of the Apes."

Meanwhile, buzz suggests that Incredible Hulk sequel could be in making. Lou Ferrigano who played the part in original Hulk movie recently revealed to local radio station in Minnesota (via Latino Review): "Now because he saved the day they're making another solo Hulk movie after the second Avengers comes out."

There is no official word from the production regarding the solo hulk movie. The upcoming movies from the marvel cinematic universe include, "Age of Ultron," "Ant-Man," "Captain America 3," "Avengers 3" and possibly "Doctor Strange."

"Avengers: Age of Ultron" star cast is as follows: Robert Downey Jr (Iron Man), Chris Evans (Captain America), Mark Ruffalo (Hulk), Chris Hemsworth (Thor) and Scarlett Johansson (Black Widow). Other actors featured in the film include Cobie Smulders (Maria Hill), Jeremy Renner (Hawkeye), Aaron Taylor-Johnson (Quicksilver), Elizabeth Olsen (Scarlet Witch), Paul Bettany (The Vision), Samuel L Jackson (Nick Fury) and James Spader (Ultron).

The movie will be about a disturbed robot Ultron as the villain. The movie will release on May 1, 2015 in the US.