Robert Downey Jr. will step away from his role as an action star, to lend his voice to a 3D animated feature. According to EW, Downey has been cast in the upcoming film Peabody & Sherman. If those names sound familiar they should, they were characters featured on the TV series “Rocky and His Friends” as well as “The Bullwinkle Show.”

Downey will voice Mr. Peabody, the genius of the two, who happens to be a dog. The screenplay for the new Peabody & Sherman was written by Jeffrey Ventimilia and Joshua Sternin, who have done work on “The Simpsons” and the recently adapted Yogi Bear film (we’re not sure if that’s a good sign). The project was just announced internally over at DreamWorks Animation.

The cartoons were created in the late 1950s and ’60s, but remained popular for decades, though they may have fallen off the radar for those under 30. The new animated feature, planned for 2014, aims to bring the duo back to the pop culture mainstream. “Certainly for Boomers, they’re in the sweet spot of our childhood animation memories, but beyond there it gets a little bit, well, not quite as familiar,” says director Rob Minkoff (The Lion King).

When it came to Rocky and Bullwinkle, we didn’t spend a lot of time concentrating on their spin-off/sidekick characters but when you throw in Downey, you’ve got our attention. The story must be somewhat interesting and funny if he’s decided to voice one of the main characters. We wonder who will play his partner Sherman? Any ideas?

What do you think of Downey starring in Peabody & Sherman? Are you interested in seeing the film adaptation?