- "After all these years I found you. My name is Ego, and I'm your dad, Peter. I wanted to experience what it was to be human. So I created what I thought a biological being would be like."
- ―Ego the Living Planet to Peter Quill
Meeting Meredith Quill
Ego was a member of an ancient, mysterious alien race that visited Earth in the late 20th Century, and conceived a son with human Meredith Quill. She described him to her son as an "angel," and a being of pure light, which her family seemed to regard as a delusion. Although, Yondu Udonta remembered him as a "jackass". In 1988, he hired the Ravagers led by Yondu Udonta to bring his son to him. However, Yondu trained Peter Quill to be a Ravager as his protégé. After the Battle of Xandar, the Nova Corps did an analysis of Peter Quill. Irani Rael commented that Quill's father was something "they had never seen before." 
To be added
- In the comics, Ego is a conscious planet who has been an enemy of Thor and the Nova Corps for a long time.
- In the comics, Peter Quill's father was J'son of Spartax, the Emperor of the Spartoi Empire.
Behind the Scenes
- Upon the release of the first Guardians of the Galaxy film, only four people knew the identity of Peter Quill's father: James Gunn, Kevin Feige, Michael Rooker and Sean Gunn. James Gunn also confirmed that Jason of Spartax was not intended to be Peter Quill's father as in the comics.
- James Gunn himself, at the San Diego Comic Con on July 23, 2016, revealed that Ego was Peter Quill's father.
- 20th Century Fox owned the cinematic rights to Ego the Living Planet, and Marvel Studios, in order to use him in Guardians of the Galaxy Vol. 2, traded his right in order to change the powers of Negasonic Teenage Warhead, who was later used in Deadpool. Gunn was unaware that Marvel did not own the character, and was very lucky to have the deal work out: "When I first pitched Ego as Quill's father, I THOUGHT we owned the character. After I had worked out a very elaborate story with Ego the Living Planet as a very important part of the Marvel cosmic universe, I learned that we actually didn't own the character. I had no back up plan, and it would be nearly impossible to just drop another character in. Thank God Fox came to us and wanted to make a trade."
- Coincidentally, both "Ego the Living Planet" and "Negasonic Teenage Warhead" are names of songs of the band Monster Magnet.
- Matthew McConaughey was offered to portray the character before Kurt Russell, but he turned it down for The Dark Tower movie.
- ↑ SDCC: MARVEL STUDIOS REVEALS LATEST PHASE 3 SECRETS
- ↑ Guardians of the Galaxy
- ↑ James Gunn Dishes On Star-Lord's Dad And THANOS' Role In GUARDIANS OF THE GALAXY 2
- ↑ James Gunn on Facebook
- ↑ Ryan Reynolds And Paul Wernick Talk ‘Deadpool’ Sequel And The Surprising Link To ‘Guardians 2’
- ↑ James Gunn on Facebook, 14 November 2016
- ↑ Matthew McConaughey On Choosing THE DARK TOWER Over GUARDIANS OF THE GALAXY VOL. 2