Bella Thorne was only 12 when filming started, prior to turning 13 the Year Shake It Up (2010) premiered.
Bella Thorne guest starred in an episode of Zendaya's new show K.C. Undercover (2015), during which she said the phrase " shake it up " at least once referencing the title of this show, as did Deuce's actor Adam Irigoyen.
China Anne McClain was going to audition for Rocky Blue but she was too sick to make it to auditions, leaving Rocky and Cece's ages at the start of the series to be changed from 12 to 13. She'd later star as a main cast member in A.N.T. Farm (2011) 1 year later, a show that Zendaya (Rocky) made a guest appearance in one of the episodes.
Zendaya, Olivia Holt and Austin North (Latter 2 being the stars of I Didn't Do It (2014)) all graduated from Oak Park High School at the same time [June - 2015 ].
Bella Thorne is one year younger than Zendaya in real life, but in Shake It Up (2010) they are the same age.
The actor that plays Deuce was a Cuban but in real life hes Italian and Puerto Rican with a background of Portugal.
Rocky Blue is Zendaya's very first role on Disney Channel. Later she'd star in 2 Disney Channel Original Movies (Frenemies (2012) and Zapped (2014)), as well the main character of another show that premiered 14 months after Shake It Up (2010) aired it's final episode in November 2013, K.C. Undercover (2015), which also ran for 3 seasons, but had more episodes.
Bella Thorne and Zendaya (who played the Main Characters CeCe Jones and Rocky Blue) are the only cast members to appear in every episode of the series.
For unknown reasons, despite Tinka appearing fairly frequently in the show alongside her twin brother Gunther, and appearing more in the show than he did, Caroline Sunshine was not shown in the intro for Season 1, but would later be added to the intros of the other 2 seasons. A similar thing happened with Corey Fogelmanis in Girl Meets World (2014) 4 years later.
Though not part of the cast, Selena Gomez from Wizards of Waverly Place (2007) sang the Show's Theme Song. In Season 3 it was cut to only less than 30 seconds, shortening the intro and removing Kenton Duty (Gunther) due to him leaving the cast, reducing the amount of Main Cast Members from 7 to 6.
Gunther and Tinka Hessenheffer are twins, and both were born in 1995 in real life, though with Kenton Duty being 4 months older than Caroline Sunshine.
A fourth season titled "Shake it up 4-ever" was planned however Disney choose not to renew the series.