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 | Yolanda García Serrano | Writer |
| Writing | Manuel Gómez Pereira | Writer |
| Writing | Juan Luis Iborra | Writer |
| Writing | Joaquín Oristrell | Writer |
| Sound | Joan Vives | Music |
| Camera | Fernando Arribas | Director of Photography |
| Editing | Miguel Ángel Santamaría | Editor |
| Production | Marisol Pérez Aparicio | Casting |
| Art | Wolfgang Burmann | Art Direction |
| Costume & Make-Up | Helena Sanchís | Costume Design |
| Costume & Make-Up | Mar Bardavío | Assistant Makeup Artist |
| Costume & Make-Up | Juanvi Fernández | Makeup Artist |
| Costume & Make-Up | Antonio Panizza | Hairstylist |
| Costume & Make-Up | Jean-Jacques Puchu | Assistant Hairstylist |
| Costume & Make-Up | Gregorio Ros | Makeup Artist |
| Production | Carlos Baeza | Assistant Production Manager |
| Production | Tino Calvo | Assistant Production Manager |
| Production | David Jareño | Production Manager |
| Production | José Miguel Jareño | Assistant Production Manager |
| Production | Emilio A. Pina | Production Manager |
| Production | Óscar Rubio | Assistant Production Manager |
| Directing | Álvaro de Armiñán | Second Assistant Director |
| Directing | Edgar Farrán | Assistant Director Trainee |
| Directing | Covadonga R. Gamboa | Third Assistant Director |
| Directing | Pedro Manuel Lazaga | First Assistant Director |
| Sound | Ricard Casals | Sound Mixer |
| Sound | Luis De Veciana | Sound Editor |
| Sound | James Muñoz | Sound Editor |
| Sound | Agustín Peinado | Sound |
| Sound | Manuel Peinado | Boom Operator |
| Crew | Reyes Abades | Special Effects |
| Crew | Ricardo Cruz | Stunts |
| Lighting | Alberto Arnal | Electrician |
| Camera | Fernando Arribas | Camera Operator |
| Lighting | Fernando Beltrán | Electrician |
| Lighting | Rafael García Martos | Gaffer |
| Camera | Josu Inchaustegui | Steadicam Operator |
| Camera | Miguel Ángel López | Grip |
| Lighting | Antonio Martínez Roque | Electrician |
| Camera | Daniel Martínez | Still Photographer |
| Lighting | Eugenio Martínez | Electrician |
| Camera | Raúl Martínez | Camera Trainee |
| Lighting | Rogelio Martínez | Electrician |
| Camera | Carlos Miguel | Key Grip |
| Camera | Christian Molina | Second Assistant Camera |
| Camera | Ramiro Sabell | First Assistant Camera |
| Costume & Make-Up | Dolores Plaza | Costumer |
| Costume & Make-Up | Pilar Tavera | Wardrobe Master |
| Editing | José García | Assistant Editor |
| Editing | Alfonso Sevilla | Assistant Editor |
| Production | Alfonso Jadraque | Location Manager |
| Production | Aramis Sierra | Location Manager |
| Directing | Yuyi Beringola | Script Supervisor |
| Crew | Ángel Megino | Transportation Coordinator |
| Production | Alicia Allepoz | Production Assistant |
| Production | Cecilia Maric | Production Secretary |
| Production | Fernando de Garcillán | Associate Producer |
| Production | Manuel Gómez Pereira | Producer |
| Production | Joaquín Oristrell | Producer |
| Production | César Benítez | Executive Producer |
