The first lady was recently confirmed for a cameo as herself in an upcoming episode revolving around the Joined Forces initiative which offers support to military families.
"I just found out about it today [when creator] Dan Schneider told the whole cast and I'm just really excited," Munck told US Weekly.
"I am stoked. It's going to be absolutely off the hook. I haven't heard of a Nick show that had a presidential figure on it yet, so it was really, really startling and totally cool. The whole cast is really excited."
Obama will film scenes with Carly (Miranda Cosgrove) and her friends following a rule-breaking incident in which they try to set up a video conference with Carly's father, who is serving in the military overseas. The episode will most likely air in January.
Big Bang Theory star Jim Parsons recently signed up for a guest spot on the show later this season.
iCarly has been renewed for a fifth season.