Chris Hemsworth's son Tristan is a young author in the making — and his latest piece was dedicated to his super hero dad. The _Thor_ star, 37, shared a photo of his son's latest

creative writing project on Instagram Wednesday. "My special friend is dad, together we go in the pool, together they make me feel happy," the 6-year-old wrote. His teacher had

added an approving mark, writing, "well done Tristan." Hemsworth rewrote the note in the Instagram post's caption, adding, "❤️😭" The Marvel star shares Tristan, his

twin Sasha, and daughter India, 8, with wife Elsa Pataky. The couple celebrated 10 years together in December, both sharing throwback photos on Instagram. _NEVER MISS A STORY — SIGN UP FOR

years of photographs was almost as fun as the real thing!" Pataky, 44, wrote in her own post. "Here's to many more years of wonderful times, love you always and forever

@chrishemsworth"