Una and an alien robot have 24 hours to find her Grandpa who was kidnapped by aliens. The extraordinary adventure leads to friendship, the rational robotic logic is replaced by emotions and Una's selfless love saves her partly alien family.
Unfortunately the movie My Grandpa is an Alien is not yet available on HBO Max.
| Visual Effects | Michal Křeček | Visual Effects Supervisor |
| Writing | Irena Krčelić | Story |
| Directing | Dražen Žarković | Director |
| Writing | Pavlica Bajšić | Writer |
| Directing | Marina Andree Škop | Director |
| Writing | Branko Ružić | Writer |
| Production | Marko Škop | Co-Producer |
| Production | Nicholas Sando | Co-Producer |
| Production | Trine Aadalen Lo | Co-Producer |
| Production | Marina Andree Škop | Producer |
| Production | Ján Meliš | Co-Producer |
| Production | Dagmar Sedláčková | Co-Producer |
| Sound | Stein Berge Svendsen | Music |
| Production | Čejen Černić | Casting |
| Costume & Make-Up | Zorana Meić | Costume Design |
| Costume & Make-Up | Mojca Gorogranc | Makeup Artist |
| Crew | Sven Pepeonik | Cinematography |
| Editing | Marina Andree Škop | Editor |
| Production | Darija Kulenović Gudan | Producer |
| Production | Senad Zaimovic | Co-Producer |
| Production | Adolf El Assal | Co-Producer |
| Production | Wekas Gaba | Co-Producer |
| Production | Ida Weiss | Co-Producer |
