Episode 21, also known as Una medallita, un secreto, sobre ruedas (A Necklace, a Secret, on Wheels), is the twenty-first episode of the Disney Channel Latin America series Soy Luna. It aired on April 11, 2016.
- Karol Sevilla as Luna Valente
- Ruggero Pasquarelli as Matteo Balsano
- Valentina Zenere as Ámbar Smith
- Michael Ronda as Simón Álvarez
- Malena Ratner as Delfina
- Agustín Bernasconi as Gastón Perida
- Katja Martínez as Jazmín Carvajal
- Ana Jara as Jim
- Jorge López as Ramiro
- Chiara Parravicini as Yam
- Gastón Vietto as Pedro
- Lionel Ferro as Nicolás
- Carolina Kopelioff as Nina Simonetti
- Luz Cipriota as Tamara
- Lucila Gandolfo as Sharon Benson
- Rodrigo Pedreira as Rey
- David Muri as Miguel Valente
- Ana Carolina Valsagna as Mónica Valente
- Diego Sassi Alcalá as Tino Alcaraz
- Germán Tripel as Cato Alcoba
- Antonella Querzoli as Amanda
- Paula Kohan as Mora Barza
- Ezequiel Rodríguez as Ricardo Simonetti
- Caro Ibarra as Ana
Note: In this episode, Paula Kohan, Ezequiel Rodriguez, and Caro Ibarra were absent.
- There were no guest actors in this episode.
- The second round of the skating competition happens at Jam & Roller.
- This episode premiered on Ezequiel Rodríguez's birthday, although his character did not appear in this episode.
- It is revealed that Ámbar has a birthmark in the shape of a star on her hip.
| To view the Season 1/Episode 21 gallery, click here.