his first / her first
Tom a brûlé son premier dîner.
Tom burned his first dinner.
Elle mit au monde son premier enfant à vingt ans.
She gave birth to her first child at the age of twenty.
Voilà un homme qui remporte son premier Grand Prix.
Here's a man who wins his first Grand Prix.
— F1® Le Film (2025)
Le petit a dit son premier mot aujourd'hui.
The little one said his first word today.
Son premier réflexe a été d'appeler les secours.
His first reaction was to call for help.
Elle lui donna son premier baiser.
She gave him her first kiss.
C'est son premier enfant, on a le temps, même si elle a perdu les eaux.
It's her first baby, we've got time, even though her waters have broken.
— A Taxi Driver (2017)
Elle était très inquiète pour son premier vol.
She was very worried about her first flight.