Jennette McCurdy & Ariana Grande Celebrate Birthdays On Set with Penny Marshall & Cindy Williams

jennette-ariana-bday-062613What’s better than one birthday? How about a double birthday!

“Sam & Cat” stars Jennette McCurdy and Ariana Grande both celebrated big birthdays today. Jennette turned the big 21 while Ariana left her teenage years behind, turning 20.

The girls celebrated on the set of their hit Nickelodeon show where they were joined by television’s legendary BFFs/roommates Penny Marshall and Cindy Williams, of the iconic sitcom “Laverne & Shirley.” Penny and Cindy are making a special guest appearance, their first in over 30 years, in the upcoming Sam & Cat episode “#SalmonCat.”

The quartet are currently filming the episode and in it, Sam and Cat are ordered to rename their babysitting business because it’s too similar to “Salmon Cat,” a TV show from the ‘70s. Sam and Cat must track down the show’s two original creators (played by Marshall and Williams) and resolve their three decade-long feud.

We want to wish the happiest of birthdays to Jennette & Ariana!