Did they change siddhartha character?

In today's episode when they showed siddhartha suddenly growing beard he looked for a few minutes a different actor altogether, which I am almost sure but right at the end once again the original actor showed up. How is that possible? Did they really use two actors for whatever reason?

No it was the same person. He just looked so different with beard.

I am talking about 10 minutes or so after Sid. transformed from normal to bearded person. I felt his voice was slightly different, also the way he stood his posture etc was different, nose slightly different and felt that may be the actor was changed. But right at the very end once again with all that beard etc he looked same as before. I am still thinking it is quite possible they used two actors for whatever reason. We may soon will find out.