Marvel releases two new 'Avengers' behind-the-scenes featurettes

A brand new pair of behind-the-scenes featurettes for Avengers: Age of Ultron has arrived online courtesy of Marvel.

The first featurette focuses on the chemistry between the cast members - and the challenge for director Joss Whedon of reining in the fun to get the movie made!. The second film follows the production around the world as it films in Italy, New York, the UK, South Korea and South Africa.

Watch the new featurettes below: