"With a joyous, comical undertone, heartrending poignancy, beautiful visual and masterful score, Project Hail Mary is a marvel of a project."

"Project Hail Mary is a prime example of why cinemaphiles love going to the theatre. If popcorn flicks are capable of being intellectually stimulating, incredibly emotional, and monumentally worthwhile, then Project Hail Mary is the ultimate popcorn flick."

"There’s a stunning space sequence, blending in a kaleidoscope of colours with a whirl of motion and sound. With a joyous, comical undertone, heartrending poignancy, beautiful visual and masterful score, Project Hail Mary is a marvel of a project."

The online reactions have so far aligned with this Reddit user's assessment, saying: "It perfectly captures the spirit and heart of the book which is all I could want."

Another user said: "I finished the book last week and I love that the movie really understood that the emotional core of the story is Grace and Rocky's friendship, they really nailed it."