Yes, knowing the actor is immersion breaking for me.
For example, I LOVE the TV series The Expanse. But then I go on YouTube and there are videos where the cast sit around and talk about their experiences making the show - I avoid these like the plague!
James Holden and Amos Burton are some of my favorite characters. I don't wanna be reminded that they are actually Steven Straight and Wes Chatham. I prefer to think that right now Holden and Amos are off having some adventure out in The Belt right now.
I don't wanna know the actors or anything about them.