Sandro Rosta is a BritishâÂÂCanadian film actor who became known for his role as Cadet Caleb Mir in the U.S. television series .
Rosta completed a threeâÂÂyear acting program at the Oxford School of Drama, graduating in 2024, having previously attended the school's oneâÂÂyear Foundation Course in 2020/21.
Rosta initially appeared mainly on stage shortly after completing his training. He made his professional debut at the Hampstead Theatre in the production The Harmony Test. During his training, he had also performed in plays such as Romeo and Juliet, The Cherry Orchard, and The Watsons.
Rosta landed his first major screen role in the television series Star Trek: Starfleet Academy, which premiered on the streaming service Paramount+ in January 2026. In the series, he portrays the human cadet Caleb Mir, a member of the newly reâÂÂestablished Starfleet Academy. Rosta was cast after being selected from over 400 candidates following a chemistry read with the co-star Holly Hunter, whose immediate connection with him convinced the showrunners of his authenticity.
Previously, Rosta had taken part in the CA$5,000âÂÂbudgeted student project Snitches Get Stitches (2021), directed by Aaron Rubinoff, a thesis film created by students at the RTA School of Media at Ryerson University.
In January 2026, Rosta appeared together with Holly Hunter and other cast members of Star Trek: Starfleet Academy on NBC's Kelly Clarkson Show to promote the series.