The first day of Sam and Cat officially began back in September 11th, 2012 with Jennette McCurdy showing her Sam and Cat face.
The following day, Ariana Grande tweeted a photo of the script, even under Dan Schneider’s threat of destroying her phone if she leaked any more information.
On September 13th, 2012, both Jennette and Ariana were getting ready to start the pilot filming.
There were auditions on the previous days for Sam and Cat including an elderly man, limo driver, food truck worker, and a character named Melanie. The announcement for the pilot was confirmed by both Jennette and Ariana the day before (September 18th, 2012).
During rehearsals, Ariana tweeted that there were plenty of stunts. Below are some behind the scenes photos on the Sam and Cat set (one which appear to be Jennette and Ariana performing a melody):
At the end of a long day of shooting, Jennette tweeted the following: