Sorry, I was just informed by the developer that the House M.D. games does NOT feature the actual actors voice overs, just their likenesses. However, the voice overs are believable.
From the credits, it looks like the actual cast is doing the voices. Hugh Laurie, Olivia Wilde, Omar Epps, Peter Jacobson, Jennifer Morrison...
Sorry, I was just informed by the developer that the House M.D. games does NOT feature the actual actors voice overs, just their likenesses. However, the voice overs are believable.