Elizabeth Olsen says Avengers: Age of Ultron will be a 'little harder' than the first movie.
Olsen is one of the new faces on the cast list, as she reunites with Aaron Taylor-Johnson to play siblings Scarlet Witch and Quicksilver.
And the actress hints that this second movie will be a little darker than the first.
Speaking to the Press Association, the actress said: "I'm a huge fan of the first and hopefully it can provide the same excitement, but add a little bit more darkness. It is a little harder than the first one."
We were briefly introduced to the characters at the end of Captain America: The Winter Solider, but this will be the first time they have appeared in a Marvel film so far.
The movie sees Olsen star alongside Robert Downey Jr, Scarlett Johansson, Chris Evans, Mark Ruffalo, Chris Hemsworth & Jeremy Renner, and she is having a great time.
She said: "It's so much fun. I'm like smiling every day, going to bed. It's such a great time."
Olsen & Johnson are currently enjoying huge box office success with Godzilla: which has topped the U.S. and UK charts.
Avengers: Age of Ultron is released 24th April 2015.
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