London: Actor Robert Downey Jr. says he felt "grumpy" when he started shooting for "Sherlock Holmes: A Game of Shadows".
The 46-year-old reprises his role as Arthur Conan Doyle`s legendary detective in the second film in the franchise.
"We had a brutal schedule last time, but it was so much fun, and we were kind of wondering if we could catch this thing on fire and make it work. And pretty early on we figured we were on to something," contactmusic.com quoted Downey Jr. as saying.
"And this time around, we only really started the action last week, which had me a little grumpy for a minute," he added. The movie will hit theatres December this year.