Chris and Pataky welcomed twins Tristan and Sasha on March 18, 2014. Pataky shared the good news on her Instagram, showing a picture of the babies' feet with a caption that read (translated from Spanish), "They are already at home!! Tristan and Sasha came into this world on March 18 just after the full moon. Complete happiness!!"
Tristan and Sasha are still young, but they have already developed strong, contrasting personalities. Talking to GQ Australia, Hemsworth shared, "Tristan is so athletic but there's not an aggressive bone in his body. He's the most emotional one. Whereas Sasha is like a little gangster."
The twin boys also spend a lot of time outdoors, doing anything from motocross biking to skateboarding, which has been documented frequently on Hemsworth's Instagram. Outside of their typical kid hobbies, Tristan and Sasha also appear to be fans of their superhero dad as Thor. On March 19, 2023, for their ninth birthday, the actor paid tribute to his boys on Instagram, writing, "Happy 9th birthday to my two little men! Only one way to eat cake in this house and that's to have mum slam your head into it face first!! 'Hey mum I don't like chocolate cake I prefer vanilla' 'oh really son, what about now'? @elsapataky."