On a cruise ship bound for the Caribbean, 42 year old Nanna has invited her daughter Cille and her best friend on a cruise to celebrate Cille's 18th birthday. The expectations are high, and they have big plans set for the three days aboard the cruise. But on the first evening, the dream vacation descends a nightmare, and Nanna realizes that in order to get justice, she must take matters into her own hands.
Unfortunately the movie Birthday Girl is not yet available on HBO Max.
| Writing | Michael Noer | Screenplay |
| Writing | Jesper Fink | Screenplay |
| Production | Rene Ezra | Producer |
| Directing | Michael Noer | Director |
| Production | Matilda Appelin | Producer |
| Visual Effects | Vebjørn Mjelde Roen | Visual Effects |
| Crew | Ole-André Hestetun | Technical Supervisor |
| Visual Effects | Henry Cummings | Visual Effects |
| Visual Effects | Thomas Solberg | Visual Effects |
| Crew | Tom Joelsen | Post-Production Manager |
| Production | Heli Jürisson | Casting Director |
| Costume & Make-Up | Gristina Pahmann | Makeup Designer |
| Production | Sissel-Maria Mägi | Production Manager |
| Production | Martin Oja | Location Manager |
| Sound | Daniel Weis | Foley Mixer |
| Editing | Jacob Thuesen | Editor |
| Costume & Make-Up | Angela Aadusoo | Key Costumer |
| Editing | Dylan Richard Hopkin | Colorist |
| Camera | Piret Krustok | Digital Imaging Technician |
| Art | Jaak Sova | Art Department Coordinator |
| Costume & Make-Up | Triin Leppik | Makeup Artist |
| Art | Kaspar Sellin | Graphic Designer |
| Production | Margot Privoi | Assistant Location Manager |
| Production | Daniel Lindvik | Production Manager |
| Art | Søren Schwartzberg | Production Design |
| Costume & Make-Up | Jennifer Õun | Makeup Artist |
| Directing | Katariina Rebane | Script Supervisor |
| Costume & Make-Up | Madli Maasikas | Makeup Artist |
| Production | Andreas Kask | Producer |
| Sound | Kristjan Kurm | Sound Recordist |
| Art | Kaia Tungal | Art Direction |
| Costume & Make-Up | Pille Küngas | Costume Design |
| Crew | Kristel Muiste | Production Controller |
| Directing | Matilde Matvere | Third Assistant Director |
| Directing | Marten Aun | Third Assistant Director |
| Directing | Christian 'Krølle' Pedersen | First Assistant Director |
| Directing | Jette Keedus | Second Assistant Director |
| Production | Helen Lõhmus | Line Producer |
| Sound | Carsten Richter | Foley Artist |
| Camera | Frank Saunanen | Second Assistant Camera |
| Production | Henrik Zein | Executive Producer |
| Sound | Siri Schippers Skaar | Sound Editor |
| Production | Gro Therp | Casting |
| Costume & Make-Up | Kreet Maurer | Wardrobe Supervisor |
| Camera | Adam Wallensten | Director of Photography |
| Visual Effects | John Cato L. Finnebråten | Visual Effects Supervisor |
| Camera | Kaarel Tiidus | First Assistant Camera |
| Production | Anne-Louise Lucas | Associate Producer |
| Sound | Bror Kristiansen | Sound Re-Recording Mixer |
| Sound | Boris Parunov | Sound Editor |
| Lighting | Aslak Lytthans | Gaffer |
| Sound | Nils Aré Viken | Sound Re-Recording Mixer |
| Crew | Enar Tarmo | Stunt Coordinator |
| Visual Effects | Peter J. Spence | Visual Effects Supervisor |
| Sound | Nils Aré Viken | Supervising Sound Editor |
| Sound | Jan Andresson | Boom Operator |
