By Jennifer Davis
Updated Jan 27, 2016 @ 1:30 pm
Chris Pratt
Credit: Jason Merritt/Getty Images

Chris Pratt is one of the most successful actors in Hollywood right now, but that hasn't always been the case. Before he starred in blockbusters like Guardians of the Galaxy and Jurassic Park, he was a young, struggling actor doing everything he could to make his big break. Fast-forward fifteen years and Pratt is still passionate about the work he does and very grateful for how far he's come.

Earlier this morning, the actor took to his Instagram account to reflect on his career and offer up some very inspiring advice for aspiring actors. "It's 3:20am. I got picked up for work at 6:45am yesterday. I'm not good with math, especially after being up for approximately 61 hours but I think I've been up for over 77 hours," he mused alongside a photo of the Atlanta highway. "I did a table read for Guardians of the Galaxy 2 this morning and then shot all day on Passengers and just now wrapped some 144 hours later...I go back in in about 8 hours to do more. I am doing what I love. It doesn't feel like work. Even though it is."

After all of his successful projects and the long hours he puts in, he's still enjoying the work just as much as he did when he first began his journey in Hollywood. "I'm having fun. I'm overcome with joy and gratitude. I felt like posting this to say to anyone out there chasing your dream... Fifteen years ago I felt the same passion I feel today, but I had very little opportunity," he wrote. "I had to hustle hard and go hungry. I had to eat sardines and figure out how to get gas money. And I never had a plan B. I never stopped believing. Ever. Don't give up. Apply constant pressure for as long as it takes. It will break before you do. Go get it."