Luci, Graci and Mar, three sisters that make a comedy trio, go to the wedding of their father with a woman who is 45 years younger than him. During the feast Luci's husband dies in an accident. Despite the tragedy, the trio have to fulfill their commitment acting during August in Benidorm. The widow discovers thanks to a notebook that her husband cheated on her, so she decides to flirt with everyone.
Unfortunately the movie What Makes Women Laugh? is not yet available on HBO Max.
| Directing | Joaquín Oristrell | Director |
| Writing | Joaquín Oristrell | Writer |
| Writing | Yolanda García Serrano | Writer |
| Writing | Manuel Gómez Pereira | Writer |
| Writing | Juan Luis Iborra | Writer |
| Directing | Covadonga R. Gamboa | Third Assistant Director |
| Production | Emilio A. Pina | Production Manager |
| Production | Carlos Baeza | Assistant Production Manager |
| Sound | James Muñoz | Sound Editor |
| Camera | Fernando Arribas | Director of Photography |
| Costume & Make-Up | Juanvi Fernández | Makeup Artist |
| Costume & Make-Up | Gregorio Ros | Makeup Artist |
| Sound | Agustín Peinado | Sound |
| Crew | Reyes Abades | Special Effects |
| Art | Wolfgang Burmann | Art Direction |
| Production | David Jareño | Production Manager |
| Production | Óscar Rubio | Assistant Production Manager |
| Sound | Manuel Peinado | Boom Operator |
| Costume & Make-Up | Helena Sanchís | Costume Design |
| Costume & Make-Up | Jean-Jacques Puchu | Assistant Hairstylist |
| Sound | Joan Vives | Music |
| Sound | Ricard Casals | Sound Mixer |
| Crew | Ricardo Cruz | Stunts |
| Production | Marisol Pérez Aparicio | Casting |
| Sound | Luis De Veciana | Sound Editor |
| Directing | Pedro Manuel Lazaga | First Assistant Director |
| Editing | Miguel Ángel Santamaría | Editor |
| Costume & Make-Up | Antonio Panizza | Hairstylist |
| Production | Tino Calvo | Assistant Production Manager |
| Directing | Álvaro de Armiñán | Second Assistant Director |
| Directing | Edgar Farrán | Assistant Director Trainee |
| Costume & Make-Up | Mar Bardavío | Assistant Makeup Artist |
| Production | José Miguel Jareño | Assistant Production Manager |
| Lighting | Rogelio Martínez | Electrician |
| Camera | Christian Molina | Second Assistant Camera |
| Camera | Miguel Ángel López | Grip |
| Crew | Ángel Megino | Transportation Coordinator |
| Camera | Fernando Arribas | Camera Operator |
| Production | Alfonso Jadraque | Location Manager |
| Camera | Josu Inchaustegui | Steadicam Operator |
| Lighting | Antonio Martínez Roque | Electrician |
| Production | Aramis Sierra | Location Manager |
| Editing | José García | Assistant Editor |
| Lighting | Fernando Beltrán | Electrician |
| Camera | Ramiro Sabell | First Assistant Camera |
| Camera | Daniel Martínez | Still Photographer |
| Production | Cecilia Maric | Production Secretary |
| Costume & Make-Up | Dolores Plaza | Costumer |
| Production | Alicia Allepoz | Production Assistant |
| Lighting | Alberto Arnal | Electrician |
| Production | Manuel Gómez Pereira | Producer |
| Lighting | Rafael García Martos | Gaffer |
| Lighting | Eugenio Martínez | Electrician |
| Directing | Yuyi Beringola | Script Supervisor |
| Production | Fernando de Garcillán | Associate Producer |
| Camera | Raúl Martínez | Camera Trainee |
| Costume & Make-Up | Pilar Tavera | Wardrobe Master |
| Production | Joaquín Oristrell | Producer |
| Production | César Benítez | Executive Producer |
| Camera | Carlos Miguel | Key Grip |
| Editing | Alfonso Sevilla | Assistant Editor |
