Big Bang Theory producers sued over the lyrics to 'Soft Kitty' 

From a galaxy far, far away straight to your inbox, get all the latest news on the \'Force Awakens\' right here.

WANT MORE EW? Subscribe now to keep up with the latest in movies, television, and music.

“Soft Kitty” has been sung by various characters on 

Penny (Kaley Cuoco) famously did so while playing nursemaid to a sick Sheldon (Jim Parsons). Fans will no doubt recognize the catchy tune.

The lawsuit states “The Soft Kitty Lyrics” were created in the 1930s and published by Willis Music Company in 1937 as part of the book

. It further claims that Warner Bros. Entertainment Inc. and one of the show’s producers worked out a deal with Willis Music Company, though neither parties “could lawfully ‘secure the rights’.”   

In May of this year, Kevin Cranley, president of Willis Music, posted a blog entry titled “Soft Kitty - Where does it come from?” to the company’s website. At the time, he confirmed “Soft Kitty” was published in

, though he wrote the book “was written by Laura Pendleton MacCarteney.” 

“Warner Brothers and I worked together to secure the rights for the show

and they have been using the song ever since,” he continued. “The writers wanted the song because one of them remembered it as a child. They also wanted to slightly change the words and I’m really not sure of the reason for that change.” 

Marvel Studios boss explains the powers of Doctor Strange

\'iZombie\' to stage \'Veronica Mars\' reunion with Kristen Bell

\'Glee\' star Mark Salling arrested for possession of child pornography

Dan Rather stands by CBS News report that led to his firing

\'Making a Murderer\' sparks online petitions calling for reexamination of Avery case

New \'Supergirl\' promo teases Toyman, Non, and more Martian Manhunter

Jennifer Lawrence explains why she \'really hates\' New Year\'s Eve

\'Doctor Strange\': 6 EW Exclusive Photos of Marvel\'s Magical Movie

Ranking Quentin Tarantino\'s Films, From \'Reservoir Dogs\' to \'Hateful Eight\'

Double Take: Celebs With Their Wax Figures