User blog comment:Kittyfire/Random Topic Blogging!/@comment-1692496-20111021022635/@comment-2077777-20111021121637

I always knew Marceline as voiced by Olivia Olson, because around the time it was ne, I missed an episode with Marceline (don't remember which one it was) And used Xfinity Ondemand to see the episode, I figured she was voiced by her, but I was 100% sure when I saw her name next to "Olivia Olson" in the credits for a split second. :D

And on a more interesting note, the current voice of Finn is by the younger brother of the ORIGINAL voice of Finn/Penn in the original Adventure Time short.

@ Kuzlulu:SPEAKING OF THOSE TWO, ONE AN INTERESTING NOTE *Caps lock off* Fiona is voiced by Madeleine Martin, and Prince Gumball is voiced by Neil Patrick Harris.

And on an even MORE interesting note (Not related to voice actors) Fiona is based on a Sailor Moon character.

And on an even MORE interesting note, the creators of Adventure time are a Prince Gumball/Marshall Lee shipper :U